I have a NIS 2010 subscription for 3 PC's which I have installed on 2 laptops and a desktop. The desktop has Windows 7 Professional 64 bit. I also installed XP Mode on this desktop to run programs I have that won't run on 7 and was doing some research and found out that XP Mode should have it own antivirus installed. My question is; With my 3 PC installs used on this subscription, can I install NIS2010 on XP Mode seeing that it is on the same Desktop PC with Windows 7 installed? If so, is there anything special I have to do to install it? My reasoning says yes I could because is it is the same PC that needs the protection and not an additional PC but I don't know for certain and would like someone that knows for sure. Can someone help? I hope I am in the right forum for this question.