Applications Slow and Unstable all of a Sudden?

Hello
   I recently re-formatted and re-installed Mac. Everything was fine for the first day or two of using, however applications (as well as finder) are having some major problems now.
If I open iTunes, sometimes it will open instantly like normal; sometimes it will bounce once and then the entire computer will freeze (except I can still use Expose and Mission Control via gestures). Once an application is running, it seems to do okay, with the exception of chrome, which will cause the same problems as iTunes (sometimes even worse, forcing me to hold the power button until it shuts down. One of the triggers for freezing seems to be attempting to control anything other than the app that is in the foreground. If I try to click off of the window, everything will freeze. Force quit rarely responds in these situations.
I'm pretty upset at the moment, as I have noticed other unrelated performance dips as well, and can hardly multitask as well as my friends new $600 toshiba laptop. I paid a fair amount more than $600, and am incredibly dissapointed that this is an issue already.
The laptop was purchased late December, 2011.
Specifications :
Processor : 2.5GHz Quad Core i7
Ram : 8GB 1333MHz
GPU : Intel HD 3000 (512Mb) + 6770M (1Gb)
Hard Drive : 512Gb SSD
Display : Hi-res Anti-glare (1680x1050 I believe)
     I'm not with the computer at the moment so I can't C+P off of System Info.
        Any help would be greatly appreciated. I can't afford to drop another $4,000 on a laptop, and need to fix this ASAP.

Boot up holding command-r keys into Lion Recovery Volume.
The screen should give you these choices...
Restore from TM backup
Reinstall Mac OS X
Get help online
Disk Utility
First run Repair Disk and see what it reports... if there are problems run until repaired or states it cannot be repaired. Then,
choose Reinstall OS X. This will be an install in place and won't affect any of your own data.

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I've been through all of the forums (I think), but nothing i've found seems to do the trick. Please bear with me, because i know that this is a common post, but I'm frustrated.
My symptoms are:
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3. File saves take forever (compared to before)
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Notice I have not yet tried to reinstall OS. I can't imagine why that would work. The problem here should also have nothing to do with any recently installed app, since nothing has been installed. The only thing that may have been installed would have been an Apple update (OS or other). Not sure i can pinpoint this to an Apple update because I don't when exactly the problems started in relation to the updates.
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thanks

{quote:}Notice I have not yet tried to reinstall OS. I can't imagine why that would work. The problem here should also have nothing to do with any recently installed app, since nothing has been installed. The only thing that may have been installed would have been an Apple update (OS or other). Not sure i can pinpoint this to an Apple update because I don't when exactly the problems started in relation to the updates.{quote}
Hi John
Before doing a Reinstall or Archive and Install you might want to first download and install the 10.5.7 Combo Update to see if that makes a difference. The 10.5.7 Combo Update can solve minor issues within the OS X and would insure that your software is completely up to date.
http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx1057comboupdate .html
If however you decide or wish to reinstall the OS X, an Archive and Install will save your data where as a Reinstall will wipe all your current data.
http://support.apple.com/kb/HT1545
I also noted that a MacBook just showed up in your profile. If it's a PPC MacBook and you migrated to the Intel, you maybe having software compatibility issues.
http://discussions.apple.com/thread.jspa?threadID=435350
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I misread that the in kernel driver of v3.12 was working properly. THat way you can figure out what exact change broke performance by testing different development kernels.
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