Virus Detection

My computer was working fine. I went to a website 
2 seconds after I got there my computer shut down unexpectedly. Does that mean I got a virus and if so how can I tell? Both my virus protection programs say that I do not have a virus but I still suspect something happened and do not want to reconnect to the Internet.
I ran AVG and Spybot, both say system fine.
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JohnBusiness Consultant (Owner)Commented:
Softwebsolutions appears to be a legitimate company with a valid US address.

Start your computer in Safe Mode and Restore to a Prior point. Assuming Windows 7, press F8 at startup and restore to a prior point can be found in Action Center
F IgorDeveloperCommented:
You can go to "Administrative tools" => "Event viewer" and search for date/time your coumputer shuts down,
if there is some errors / warnings  associated with that event. Could be a hardware problem in your computer.
(normally a virus does not cause an unexpected shot down without causing failing events)

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TypingStarsAuthor Commented:
I already restored my computer to an earlier date.  Not knowing the capabilities of these issues, just wanted to know that I did everything possible to properly address it.

I see a whole list of type Critical level errors with source Kernel Power event id 41.

This unexpected shutdown has occurred once in a while before yesterday, I just found it strange that the moment I brought this site up my computer turned off.
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JohnBusiness Consultant (Owner)Commented:
You could have a coincidental hardware issue (heat, motherboard, hard drive failure, accessory part failure).

You could have operating system damage. Run System File Checker. Open cmd.exe with Run as Administrator and run SFC /SCANNOW twice. Allow to complete, shut down, start up and test.
F IgorDeveloperCommented:
As John says, it's a coincidental issue.
If you are getting Critical events about Kernel power,  the problem is probably on system drivers (ACPI Power management, sleep/wake events, USB power) , or hardware (power supply unit, cpu , system fan).
Have you installed/updated new devices , hardware or programs?
TypingStarsAuthor Commented:
Thank You for your suggestions!
I'll run the System File checker and then follow-up
TypingStarsAuthor Commented:
I ran it twice and It did not find any errors.
No new devices or software except for Malwarebytes today.
JohnBusiness Consultant (Owner)Commented:
Thanks for update and I was happy to help.
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