The problem started when I clicked on an image in google images. The computer shutdown immediatly and when I restarted it I got the notice that it had shutdown badly and options of starting in safe mode or normally. I started it normally and system repair ran. I finally got it started and everything seemed fine until I left it in sleep mode. When I came back it had shutdown and I had the same problem starting it. This has happened several times. If I shut it down and restart it is fine. I have System Mechanics Pro and scanned for malware and found none. Now when I search on google I am being redirected to other websites every third or fourth time. What do I do?
I have a Dell Inspiron 1545 with Windows 7 - 64 bit. I'm not a computer guy and don't know the tech terms to describe my problem.

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