I am really dissatisfied about the Mavs, how can i put it back to my Mountain Lion? since I've downloaded the Mavs, my iMovie, photo, contacts, notes has not been working properly at all. Please help! thanks

Question

i downloaded the Mavs about 2 days ago. it restarted automatically as it stated... i have not really used it again until tonight. and boy was i so ******!
after downloading the new OS update, the list below stopped and wont work properly:
Contacts
iPhoto
iMovie
Notes
if theres anyone who can help me downgrade it back to Mountain Lion, id GREATLYYY appreciate it a lot.
Thanks!

Answer 1

You don't need to downgrade. If it worked in Mountain Lion it will work in Mavericks. Do this:
Reinstall Lion, Mountain Lion, or Mavericks without erasing drive
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
     Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is
                three times faster than wireless.