Recently my resollution for IE has changed to a lower res and I started to get lag spikes in Half-Life 2 EP2 and in a Hl1 mod? What the hell is happening to my computer? I never changed any settings?

Run Maleware Bytes make sure your computer didn't get a virus.

I ran windows defender and it didnt detect anything.

Windows Defender fails, Maleware bytes is a lot better scanner

Windows Defender???

You should get a real AV, even Microsoft itself acknowledges this. Try AVG for AV and Comodo for Firewall.

EDIT: or malware bytes, lol.

http://www.superantispyware.com/ <======= best free anti-spyware out there
http://www.freerav.com/ <===== highly recommend
http://free.avg.com/ <====== from what i'm hearing, avg has been crap i know i've used much better programs
http://www.lavasoft.com/products/ad_aware_free.php
http://www.emsisoft.com/en/software/free/
http://www.hijackfree.com/en/
http://www.rising-global.com/products/r ... octor.html <=== fairly good
http://www.safer-networking.org/en/download/index.html
http://www.avast.com/eng/download-avast-home.html <===from what i hear its really good
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these websites are cool, you upload a file and it checks it for viruses
http://www.kaspersky.com/scanforvirus
http://www.virustotal.com/
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