Illegal Operation

If it's a Windows function, run Dr. Watson to resolve/send the issue to MS, however if it's a third party app that has caused a error, likely it's making a call on the memory that can't be allowed, as it attempts to over ride the Windows safety settings, usually it's a conflict between 3rd party apps, like something hovering by being loaded at startup, and is making calls on cache and memory such as a Auto-protect app for your virus program. An annoying error stoppage is IE and Outlook, which is memory/cache intensive, and a lot of time requires repairing( most folks don't know that Outlook and IE are repaired at the same time).
As to the exact cause on your machine, it is an accumalative factor, as Windows becomes John Q Windows after using it a while, however a common fault is the memory/cache issue.
Hope this shines a small lite into the mud.
Luck

This question was closed by the author