Make sure you have enough Ram. Then check for viruses.

This actually sound like the Rogue Virus. This Virus normally corrupts your computer. You probably will need to do a Reformat. Be sure and do a Back-up First., because you will loose everything.

If you know how to do a back-up, save all your documents, pictures and music. If not take it to a reputable computer shop to take of this. There will be a slight charge, but they will save all your important >Software below Read On. If you find any of this helpful, pls rate me. !

FREE SPYWARE
Download Spybot Search & Destroy. Restart computer, then run Spybot to see what spyware comes up, AND DELET IT.

FYI---Virus Protection-- 2 programs of virus protection will conflict with each other and will actually cancel out the protection. SO just download one.

Running Spybot Search & Destroy with EITHER Avast or Avg (great Free virus protection programs ) will keep a computer in good working condition. FREE

Avira AntiVir – Free Anti-Virus Protection
http://www.free-av.com/

FROM MICROSOFT 2009 -Free --Security Essentials
http://www.microsoft.com

Pop up Blocker- free
www.panicware.com

Spybot - Search & Destroy 1.5.2 -FREE SPYWARE
http://www.download.com/Spybot-Search-De…

Avast- FREE ANTI VIRUS PROGRAM
http://www.avast.com/eng/home-registrati…

AVG- FREE SPYWARE PROGRAM
http://www.free.avg.com

Ccleaner- FREE
http://www.download.com/3120-20_4.html?q…

Malware- FREE
http://www.malwarebytes.org/.

$ *** KASPERSKY ***
http://www.kaspersky.com

There are alot of $ anti-virus and Internet security programs out there-ie: Norton, McAfee, Panda, Bitdefender. If you would like to pay $ then get ***Kaspersky***-- 2010 ,
I feel that is the best for your money.

REMEMBER TO KEEP UP THE DAILY MAINTENANCE ON ALL OF YOUR COMPUTERS.!

Good Luck. If you think this is good information, please rate me.
Thanks :0)