I installed Windows 7 Ultimate a couple of days ago. Laptop was working like brand new. Windows advised me to get an anti-virus program, which I did after using the web for updates, mail, general browsing etc. Ever since I installed Kaspersky AntiVirus 2010, it seems as though my CPU loads more often. As well, it scans for trojans, viruses, spyware etc constantly, and so far it has found 360 threats, but no trojans, viruses, just threats. It detects 360 of some files that is similar to a PDM.Invader, which I don't know what that is. I thought Kaspersky was good but I'm not sure, it has slowed my laptop down a little bit and it doesn't even clean those threats, even when I do a full system scan it doesn't detect those threats. And it constantly scans, so far it has scanned close to 400 000 files and there is hardly anything on my laptop. I'm not sure of what to do at this point as this has been annoying me for the whole day (the PDM.Invader threats has been appearing in constant intervals). If anyone can help me out that would be great. Thanks.