All the troubleshooting assistance found here has been re-written and updated in my Macintosh Troubleshooting book: 'Fix a troubled Mac'

Available to purchase ($15), from the KAGI online store.

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These Procedures are for any Macintosh that can boot into Mac OS 9.2.2 or earlier. If you need Mac OS X bootable only Support, go here

Application Problems
(on launch or during use)

• Increase application memory (get info on application icon)
  

• Temporarily move troublesome application's preferences to desktop. (Adobe software is a big offender)
  

• Disable Sleep settings in Energy Saver control panel
  

• Check to see if application will launch after extensions are disabled.
  

• Disable Virex Control Panel, Norton AntiVirus &/or Norton Utilities to verify that they are not the problems
  

• Check for any corrupt fonts (disable non system fonts first)
  

• Check for and disable either Adobe Type Reunion, ATM Deluxe, Extensis Menu Fonts or Suitcase Extension.
  

• Disable Aladdin Magic menu or other auto file compression software
  

• Turn Virtual Memory OFF (Prior to Mac OS 8, increase/decrease disk cache, turn 32bit address on/off etc)
  

• Check Resoures in System (eg: CarbonLib, Apple Guide, Applescript) are available and up to date.
  

• Check for desktop/background printing issues. Hold or Delete any queued print jobs, trash items in Printmonitor folder in System.
  

• Check for Network connectivity or File Sharing (turn off) issues (for more info see Network issues)
  

• Try disconnecting the Ethernet connection as some programs may be negotiating a network for some strange reason. (eg: templates on an obsolete or missing server)
  

• Check for ATI, Nvidia or other graphics driver related issues (monitor resolutions, bit depth, screen sleeping)
  

• As a last resort, trash the crashing Application preferences, Reinstall & rebuild desktop.