I've just started using this, and am wondering if anyone can provide any opinions on it. http://avs.nprotect.com/en/ It uses Bitdefender's scan engine, along with its own anti-virus and anti-spyware engines. Version 3 was originally release in 2011 or maybe even earlier, but it is reguarly updated. The most recent release was published a month ago. It has low, mid and high real time scan levels. I'm using the default "mid" setting and it is extremely light. Also, CPU use is isn't excessive when doing scans. I like it becuase it is very light, has the option to not automatically quarantine files, and it is very easy to add threats to the ignore list. From the logs screen you can choose to ignore a detected threat. On the downside, it seems that its Bitdefender definitions are a day old. I am wondering if anyone has any opinions on this in terms of protection. I find the Bitdefender based Roboscan to be very light as well, but was not happy with the detection rate. Also unlike nProtect, Roboscan has not been updated in a long time.