Adobe Illustrator CS2 Won't Save and Gives "An Unknown Error Has Occurred"

My partner and I received new Win7 PCs.  He installed Adobe Illustrator CS2 with no problems.  After I installed it, when I try to Save in any format to anywhere, I get "An Unknown Error Has Occurred".  Internet says it is either a corrupt preference file or bad installation due to an antivirus running (which it was at the time of install).  First, I tried to delete the preferences file (Allprefs), then everything in the main preferences folder (C:\Users\Randy.UNITED\AppData\Roaming\Adobe\Adobe Illustrator CS2 Settings), without success.  Then in uninstalled it and deleted any folder related to Illustrator.  I then reinstalled it without the antivirus running, but still receiver the error.  Maybe there is a folder I missed deleting?
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If you seta restore point prior to installing revert to that.  Also be sure to delete the files from the Temp folder as well. You may also have to edit the registry and delete any keys associated with the adobe install as there will be several remaining, which will most likely be your issue.
rvfowler2Author Commented:
Can't do a restore point as I installed a whole slew of programs last night on my newly imaged computer.  Went through the Temp folders, but nothing was in them.  Delete all registry entries associated with .ai and Illustrator, but it makes me hesitant to try again when I see that my icon has not blanked out but shows the Illustrator colors.
rvfowler2Author Commented:
Had to upgrade Adobe from CS2 to CS5 for this to work on Windows 32-bit.

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rvfowler2Author Commented:
The solution provided did not work.
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