Hi, I don't remember what I did but I got this problem. This program has performed an illegal operation and will be shut down. So what should I do? Get Ubuntu? To get a Mac or to stay with Windows 7 and call the local police to tell them that Windows is doing illegal operation and that Microsoft should be arrested or sued?
Upgrade from Windows 9x to an NT based Windows such as XP or 7, they: a) Don't crash as much b) Don't give "illegal operation" messages.
As the computer and program owner you will likely be executed - and Microsoft will escape by claiming you violated their licence terms and sue you for damaging their reputation. I'd change my name and move immediately if I were you.