Your post leaves too much information out. Did you see the note in red above each post window?

"Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended."

Please tell us more about this computer.

When did this start and what changed when it happened, eg what were you doing when it started or what software changes had you made?

Also tell us about your anti-virus and anti-spyware procedures.

Mark