Unable to log in to iCloud

Strange issue...
Recently I am unable to log in to iCloud from my computer at work. In addition, my calendar and contacts no longer sync with my iCloud. Instead, I am getting an error message stating that 'iCloud encountered and error while trying to connect to the server'.
I checked with IT and there is no blocking of the Apple servers going on.
If you are REALLY interested, here is the dialogue from the error message...
APPLICATION NAME
cloudos
ERROR
authDidNotConnect
ORIGIN
server
TYPE
error
APP STATECHART
SC.Statechart:sc772
  initialized: true
  name: cloudos-statechart
  current-states: [
    active.authUI.fieldsEditable
  state-transition:
    active: false
    suspended: false
  handling-event: false
BUILD NUMBER
1M.63768
TIME
Wed Dec 05 2012 12:05:51 GMT-0700 (MST)        (1354734351557)
HOST
www.icloud.com
USER AGENT
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17
ENVIRONMENT
PROD
RECENT LOG MESSAGES
Wed, 05 Dec 2012 18:53:32 GMT:  DEBUG: CloudOS.main() already has localized strings, proceeding to run CloudOS.run() now.
Wed, 05 Dec 2012 18:53:32 GMT:  DEBUG: Loading localized strings and metrics
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN initialize statechart
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: __ROOT_STATE__
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: ---
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: ---
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: __ROOT_STATE__
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: loading
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: loading
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: __ROOT_STATE__
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: validatingAuth
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: loading
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: loading
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: pivot state = __ROOT_STATE__
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: loading
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: validatingAuth
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: validatingAuth.gettingReply
Wed, 05 Dec 2012 18:53:32 GMT:  DEBUG: COS: Sending validate POST request to https://setup.icloud.com/setup/ws/1/validate
Wed, 05 Dec 2012 18:53:32 GMT:  DEBUG: -->  Request 1:   POST to https://setup.icloud.com/setup/ws/1/validate?clientBuildNumber=1M.63768&clientId =5B431CA4-6CDE-4068-872C-0B159FACD905,  headers: Content-Type=text/plain,  body: (omitted)
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: validatingAuth.gettingReply
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: validatingAuth
Wed, 05 Dec 2012 18:53:32 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END initialize statechart
Wed, 05 Dec 2012 18:53:32 GMT:  DEBUG: Language check: null -> en-us. We WILL relocalize.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: <--  Response 1:  0  (576ms),  headers:   body: (empty)
Wed, 05 Dec 2012 18:53:33 GMT:  WARN:  Could not decode JSON: JSON Parse error: Unexpected EOF
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: COS: invoking validateDidFail
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN sendEvent: 'authDidNotConnect'
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: validatingAuth.gettingReply: will handle event 'authDidNotConnect'
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: active.authUI
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: validatingAuth.gettingReply
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: validatingAuth.gettingReply
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: pivot state = __ROOT_STATE__
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: validatingAuth.gettingReply
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: validatingAuth
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active.authUI
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active.authUI.downloadingAuthModule
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Attempting to load 'cloudos/auth_ui'
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudos/auth_ui' is not loaded, loading now.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: 'cloudos/auth_ui' depends on 'cloudkit/photo', loading dependency…
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Attempting to load 'cloudkit/photo'
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudkit/photo' is not loaded, loading now.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudkit/photo' -> 'system/cloudos/cloudkit/photo/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Loading CSS file in 'cloudos/auth_ui' -> 'system/cloudos/cloudos/auth_ui/en-us/1M.63768/stylesheet.css'
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudos/auth_ui' -> 'system/cloudos/cloudos/auth_ui/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: active.authUI.downloadingAuthModule
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: active.authUI
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END sendEvent: 'authDidNotConnect'
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Spent 23ms painting the background canvas, which, in addition to the radial gradient, required 12 drawImage calls for the tiles.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudkit/photo' finished loading.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Evaluating and invoking callbacks for 'cloudkit/photo'.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudkit/photo' has completed loading, invoking callbacks.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudos/auth_ui' finished loading.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Evaluating and invoking callbacks for 'cloudos/auth_ui'.
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: SC.Module: Module 'cloudos/auth_ui' has completed loading, invoking callbacks.
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: active.authUI.fieldsEditable
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: active.authUI.downloadingAuthModule
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: active.authUI.downloadingAuthModule
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: pivot state = active.authUI
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: active.authUI.downloadingAuthModule
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active.authUI.fieldsEditable
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: active.authUI.fieldsEditable
Wed, 05 Dec 2012 18:53:33 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: active.authUI.fieldsEditable
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Preloading https://www.icloud.com/system/cloudos/cloudos/auth_ui/en-us/1M.63768/stylesheet- 1.png
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Preloading explicitly-specified image system/cloudos/cloudos/auth_ui/en-us/1M.63768/source/resources/images/rotating_ gradient.jpg
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Preloading explicitly-specified image system/cloudos/cloudos/auth_ui/en-us/1M.63768/source/resources/images/canvas_ma sk.png
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Finished loading system/cloudos/cloudos/auth_ui/en-us/1M.63768/source/resources/images/canvas_ma sk.png. images remaining before callback: 2
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Finished loading system/cloudos/cloudos/auth_ui/en-us/1M.63768/source/resources/images/rotating_ gradient.jpg. images remaining before callback: 1
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: Finished loading https://www.icloud.com/system/cloudos/cloudos/auth_ui/en-us/1M.63768/stylesheet- 1.png. images remaining before callback: 0
Wed, 05 Dec 2012 18:53:33 GMT:  DEBUG: All images are downloaded. Now running callback.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Prefetching module 'cloudos/alarms'.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudos/alarms' -> 'system/cloudos/cloudos/alarms/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Prefetching module 'cloudos/language'.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudos/language' -> 'system/cloudos/cloudos/language/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Prefetching module 'cloudkit/error_catcher'.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading CSS file in 'cloudkit/error_catcher' -> 'system/cloudos/cloudkit/error_catcher/en-us/1M.63768/stylesheet.css'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudkit/error_catcher' -> 'system/cloudos/cloudkit/error_catcher/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Prefetching module 'cloudos/account'.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: 'cloudos/account' depends on 'coreweb/timezone_picker', loading dependency…
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Attempting to load 'coreweb/timezone_picker'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'coreweb/timezone_picker' is not loaded, loading now.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading CSS file in 'coreweb/timezone_picker' -> 'system/cloudos/coreweb/timezone_picker/en-us/1M.63768/stylesheet.css'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'coreweb/timezone_picker' -> 'system/cloudos/coreweb/timezone_picker/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading CSS file in 'cloudos/account' -> 'system/cloudos/cloudos/account/en-us/1M.63768/stylesheet.css'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Loading JavaScript file in 'cloudos/account' -> 'system/cloudos/cloudos/account/en-us/1M.63768/javascript-strings.js'
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudos/alarms' finished loading.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudos/alarms' was prefetched, not evaluating until needed.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudkit/error_catcher' finished loading.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudkit/error_catcher' was prefetched, not evaluating until needed.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudos/language' finished loading.
Wed, 05 Dec 2012 18:53:36 GMT:  DEBUG: SC.Module: Module 'cloudos/language' was prefetched, not evaluating until needed.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Module 'cloudos/account' finished loading.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Module 'cloudos/account' was prefetched, not evaluating until needed.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Module 'coreweb/timezone_picker' finished loading.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Evaluating and invoking callbacks for 'coreweb/timezone_picker'.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Module 'coreweb/timezone_picker' has completed loading, invoking callbacks.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Now that coreweb/timezone_picker has loaded, all dependencies for a dependent cloudos/account are met.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Evaluating and invoking callbacks for 'cloudos/account'.
Wed, 05 Dec 2012 18:53:37 GMT:  DEBUG: SC.Module: Module 'cloudos/account' has completed loading, invoking callbacks.
Wed, 05 Dec 2012 18:54:32 GMT:  DEBUG: CloudOS window received focus event
Wed, 05 Dec 2012 19:04:19 GMT:  DEBUG: CloudOS window received focus event
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN sendEvent: 'userDidSubmit'
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: active.authUI.fieldsEditable: will handle event 'userDidSubmit'
Wed, 05 Dec 2012 19:04:25 GMT:  DEBUG: CloudKit: Sending login POST request to https://setup.icloud.com/setup/ws/1/login
Wed, 05 Dec 2012 19:04:25 GMT:  DEBUG: -->  Request 2:   POST to https://setup.icloud.com/setup/ws/1/login?clientBuildNumber=1M.63768&clientId=5B 431CA4-6CDE-4068-872C-0B159FACD905,  headers: Content-Type=text/plain,  body: (omitted)
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: pivot state = active.authUI
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END sendEvent: 'userDidSubmit'
Wed, 05 Dec 2012 19:04:25 GMT:  DEBUG: <--  Response 2:  0  (247ms),  headers:   body: (empty)
Wed, 05 Dec 2012 19:04:25 GMT:  WARN:  Could not decode JSON: JSON Parse error: Unexpected EOF
Wed, 05 Dec 2012 19:04:25 GMT:  DEBUG: COS: invoking loginDidFail
Wed, 05 Dec 2012 19:04:25 GMT:  WARN:  Auth: No auth bag or recognized status code
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN sendEvent: 'authDidNotConnect'
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: active.authUI.attemptIsSubmitted: will handle event 'authDidNotConnect'
Wed, 05 Dec 2012 19:04:25 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END sendEvent: 'authDidNotConnect'
Wed, 05 Dec 2012 19:04:42 GMT:  DEBUG: CloudOS window received focus event
Wed, 05 Dec 2012 19:05:49 GMT:  DEBUG: CloudOS window received focus event
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: BEGIN gotoState: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: starting from current state: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states before: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: pivot state = active.authUI
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: <-- exiting state: active.authUI.attemptIsSubmitted
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: --> entering state: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: current states after: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:05:51 GMT:  INFO:  SC.Statechart<cloudos-statechart, sc772>: END gotoState: active.authUI.fieldsEditable
Wed, 05 Dec 2012 19:05:51 GMT:  DEBUG: CloudKit: ErrorCatcher dialog invoked.
Wed, 05 Dec 2012 19:05:51 GMT:  DEBUG: SC.Module: Attempting to load 'cloudkit/error_catcher'
Wed, 05 Dec 2012 19:05:51 GMT:  DEBUG: SC.Module: Module 'cloudkit/error_catcher' already loaded.
Wed, 05 Dec 2012 19:05:51 GMT:  DEBUG: SC.Module: Evaluating JavaScript for module 'cloudkit/error_catcher'.
Wed, 05 Dec 2012 19:05:51 GMT:  DEBUG: SC.Module: Module 'cloudkit/error_catcher' has completed loading, invoking callbacks.

You might try the following.
1. Sign out of your account
(If you are unable to do this because System Preferences has frozen, Force Quit System Preferences and try again)
2. When prompted, opt to delete, contacts, calendars etc from your Mac.
(You are only deleting this data from your Mac, not from iCloud, the data will be reinstated when you log back in. If you need to check that the data is in iCloud before deleting it go to iCloud.com and check each section for data)
3. Having logged out, check that the iCloud accounts along with their data have disappeared from the Mail, Address Book and iCal Applications.
(If necessary, delete the iCloud accounts from each of these application separately from each Applications Preferences)
4. At this point it may be worth trying to log into iCloud from the System Preferences iCloud settings again, if this works, all well and good, if it doesn't continue to step 5.
5. Open your User Library folder in the Finder. (When in the Finder, go to the Go menu, hold down the option key (alt) and choose Library when it appears in the Go menu)
6. Navigate to Library > Application Support > iCloud and drag the iCloud folder to your desktop. (This action only copies the folder and will provide you with a back up)
7. Select the iCloud folder again in Library > Application Support and drag it to the trash, enter your administrators password when prompted.
8. Restart your computer.
9. You should now be able to enter your ID and Password in system Preferences > iCloud and log into your account. Check the services you wish to use and once you are satisfied it's working as it should, trash the iCloud folder you copied to your desktop earlier.

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