Does it do that every time you open Illustrator? Reinstall.
i did but same error
Reinstalling Illy can be likened to using a sledgehammer to solve a problem that usually can be taken care of with a tweezer.
Where in the startup process is it crashing? Can you read what it says it's loading as it crashes?
Did you try deleting your preferences? That's usually the first step.
When you reinstalled, did you first uninstall? There is a utility that gets installed (I don't know where on the PC) and I think it's also on your installer disk. If you don't uninstall first, a lot of the potentially breakable files get kept and will carry the problem over to the new install.
As Jesse said - keep an eye on the splash screen and trash the prefs and workspaces. If that doesn't fix it, provide more info on your system - operating system, graphics card, processor, screen resoution, printers, tablet or not and the whole shebang...