Glitches With Various Applications - iMac 10.5.8

Question

My Photoshop CS 8.0 started quitting at startup after working perfect for years. Re-installed with same problem. Also noticed Garageband will start, but will not come to foreground when other applications are open. Suspect something in the iMac is affecting multiple programs, and mostly concerned about getting Photoshop. Don't know where to look.

Answer 1

OOPS, me bad, if it's 10.5.8 you need the 10.5 Install Disc to boot from.
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.