[Venkatesh]

If even Paint is giving such errors, I'd first try System Restore. If that doesn't work, reinstall Windows.

Have you installed any unusual programs recently, or changed anything major in your system? They might be the root of the Windows errors. Also, try closing any unnecessary processes from the Task Manager. I like to keep the number of running processes when I am not running anything under 20. The more simultaneous programs, the greater the chance for an unwanted interaction.