However I can offer the following. Because it's not reposting any Infections on a Scan doesn't mean it's not infected just that the scanner can not pick it up. I would suggest updating everything and restarting in
Safe Mode and performing the scans again. With the Minimum of Windows running you are more likely to pickup any infections and it's easier to clean them up.
It's even better not to have Windows running to check for infections so one of the Rescue Discs that Michael talks about here which can be copied to a Flash Drive and run from there as Tablets generally speaking don't have Optical Drives.
http://www.techrepublic .com/blog/security/title/3803
The next thing is the Ultimate Boot CD available free to download and use here
http://www.ultimatebootcd .com/download.html
This to can be copied to a Flash Drive and run from there to diagnose all of the Hardware in the device it's really quite good actually. OH and remember to remove the space from between the domain name and the .whatever in the above for working links.

However if this helps I did a M$ Survey today to tell M$ what they wanted to know and ever since IE fails, the System Restore was somehow turned off and none of the other browsers now is capable of leaving a response on TR. I think I may have a slight problem that has only been apparent since I was honest with M$. Perhaps that tells us something I should have lied to them and told them that their products where great and faultless.

Col