(If I understand your first problem is: you may have some virus and/or spyware) Update and run your anti-virus program.
You need to install update and do all the tweaks on a recognised anti-spyware program.
If you have an anti-spyware program installed make sure it is NOT listed on 'The Spyware Warrior List of ‘Rogue/Suspect Anti-Spyware Products & Web Sites’ http://www.spywarewarrior.com/rogue_anti
Those are "anti-spyware programs" that install their OWN spyware, while 'supposedly' removing everything else.
Use instead "Ad-Aware 2007", "Spybot - Search & Destroy", "SpywareBlaster" are three good ones. Beware of imitations and name similarities. Install and update then run them weekly after doing the latest updates.
Lastly, to stay OFF of Weird and Strange websites! ;>)
Install McAfee SiteAdvisor.
After you clean-up your computer.
Go to your "Device Manager" (Right click on ‘My Computer', select 'Properties', click the 'Hardware' tab, click the 'Device Manager' button. Click the "Sound video and game controllers"). If there is some kind of a "Warning" icon superimposed on the 'Vidieo Camera' icon there is your problem!
If no "Warning" icons then try...
One at a time...
Double click on each of the devices that have 'Vidieo' in the listings.
Click the "Properties" tab; look for any "Warning" icons
Uninstall the DRIVERS for THAT DEVICE only. See instructions below.
Click on the faulty device and hit the remove button, follow the instructions given by the program.
Shutdown, restart, the device will automatically reinstall by the "Found New Hardware" program.