IMac extremely slow after upgrading to OS Lion...suggestions please..

We recently upgraded our iMac to OS Lion from Snow Leopard and it seems like everything now takes twice as long to start. Opening applications, opening documents, switching to another user name, pretty much everything takes forever. I love the operating system, but feel like I am using a 10 year old computer. If anyone here has suggestions on how to speed things up, I would greatly appreciate it.
I have tried logging out all other users to free up some of the memory and that really doesn't help.
I love my Mac, please help....

If it is a new installation, spotlight can take forever to do the first indexing. I put my Sleep option in Power preferences to "never" (On mains power that is) and leave the computer lid open / on all night.
There are also other things going on, like, software updates,(both from Apple and third party), maintenance scripts (that run on schedule at night), Backup, iDisk and iCloud syncs (the first uploads can be large), etc.
Once the initial cludge is cleared things get much better. But get that RAM upgrade. Crucial delivered mine within 24 hours of ordering
You'll need a very small screwdriver!

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Problem description:
My Mac Pro is extremely slow after upgrading to Yosemite 10.10, even while reading my newspaper on PDF
This is my EtreCheck print
EtreCheck version: 2.0.11 (98)
Report generated 17. november 2014 kl. 10.49.28 CET
Hardware Information: ℹ️
MacBook Pro (13-inch, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro9,2
1 2.5 GHz Intel Core i5 CPU: 2-core
4 GB RAM Upgradeable
BANK 0/DIMM0
2 GB DDR3 1600 MHz ok
BANK 1/DIMM0
2 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 4000 -
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: one day 15:45:13
Disk Information: ℹ️
TOSHIBA MK5065GSXF disk0 : (500,11 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / [Startup]: 498.88 GB (290.89 GB free)
Encrypted AES-XTS UnlockedConverting
Core Storage: disk0s2 499.25 GB Online
MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Library/Extensions
[loaded] net.telestream.driver.TelestreamAudio (1.1.1 - SDK 10.8) Support
/System/Library/Extensions
[not loaded] com.devguru.driver.SamsungComposite (1.4.20 - SDK 10.6) Support
/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
[not loaded] com.devguru.driver.SamsungACMControl (1.4.20 - SDK 10.6) Support
[not loaded] com.devguru.driver.SamsungACMData (1.4.20 - SDK 10.6) Support
[not loaded] com.devguru.driver.SamsungMTP (1.4.20 - SDK 10.5) Support
[not loaded] com.devguru.driver.SamsungSerial (1.4.20 - SDK 10.6) Support
Launch Agents: ℹ️
[loaded] com.divx.dms.agent.plist Support
[loaded] com.divx.update.agent.plist Support
[loaded] com.oracle.java.Java-Updater.plist Support
Launch Daemons: ℹ️
[failed] com.adobe.fpsaud.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
[loaded] com.oracle.java.Helper-Tool.plist Support
[loaded] com.oracle.java.JavaUpdateHelper.plist Support
[invalid?] com.torch.update.agent.plist Support
User Launch Agents: ℹ️
[loaded] com.genieo.completer.download.plist Support
[loaded] com.genieo.completer.ltvbit.plist Support
[loaded] com.genieo.completer.update.plist Support
[loaded] com.google.keystone.agent.plist Support
User Login Items: ℹ️
None
Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 15.0.0.223 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
DivX Web Player: Version: 3.2.3.1164 - SDK 10.6 Support
Flash Player: Version: 15.0.0.223 - SDK 10.6 Support
OVSHelper: Version: 1.1 Support
Default Browser: Version: 600 - SDK 10.10
SharePointBrowserPlugin: Version: 14.4.4 - SDK 10.6 Support
Unity Web Player: Version: UnityPlayer version 4.5.5f1 - SDK 10.6 Support
Silverlight: Version: 5.1.20913.0 - SDK 10.6 Support
JavaAppletPlugin: Version: Java 8 Update 25 Check version
User Internet Plug-ins: ℹ️
NPRoblox: Version: 1, 2, 8, 25 - SDK 10.10 Support
Google Earth Web Plug-in: Version: 7.1 Support
Safari Extensions: ℹ️
Omnibar
3rd Party Preference Panes: ℹ️
Flash Player Support
Java Support
Perian Support
Time Machine: ℹ️
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 498.88 GB Disk used: 207.99 GB
Destinations:
Elements [Local]
Total size: 1.00 TB
Total number of backups: 0
Oldest backup: -
Last backup: -
Size of backup disk: Adequate
Backup size 1.00 TB > (Disk used 207.99 GB X 3)
Top Processes by CPU: ℹ️
      89% lsregister
      3% WindowServer
      1% mds
      1% sysmond
      0% mtmd
Top Processes by Memory: ℹ️
142 MB Preview
125 MB com.apple.WebKit.WebContent
125 MB Finder
86 MB ocspd
77 MB com.apple.WebKit.Plugin.64
Virtual Memory Information: ℹ️
335 MB Free RAM
1.63 GB Active RAM
1.32 GB Inactive RAM
776 MB Wired RAM
17.27 GB Page-ins
345 MB Page-outs

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Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
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hbhansendk wrote:
I just upgrade my iPhone6 to iOS 8.2(apple watch). After the upgrade the phone is lagging and is extremely slow. Just writing a text is a problem waiting in-between inputs.
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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
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After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.
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IMac extremely slow after upgrading to OS Lion...suggestions please..

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