If my computer just restarted itself...?

For apparently no reason.

What are some safe free antivirus or antispyware programs I can download to diagnose the problem?

If my computer just restarted itself...?norten

If your computer continues to restart, and will not go into the operating system (assumes you have windows), you may have some corrupted system files. You may need to have a computer shop save your data and attempt to repair the os or reinstall it. Some good programs to get are: AVG antivirus by grisoft (its free and in the top 10 antivirus programs), ad-aware se by lavasoft (checks for spyware), windows defender (checks for spyware, but needs a legitmate copy of the os), spybot search and destroy (checks for spyware). all software above is free for non-commercial use.

If my computer just restarted itself...?panda

Boot into safe mode (hitting F8 when it boots) and change this setting

Right click My computer%26gt;Properties%26gt;Advanced

Choose Start up and Recovery, then settings

Under System Failure UNCHECK automatically restart.

Then go ahead and run your spyware in safe mode.

But make sure your spyware is updated first and you are UNPLUGGED from the network.

Adware

http://www.download.com/3001-8022_4-1073...

SuperAntispyware

http://www.superantispyware.com/download...
search "avg" in google
go to avast.com and download the home edition is free is good
I like using AVG Antivirus. I also use Spybot S%26D for malware/spyware detection. The two together are a strong arsenal.