In the past I have used Bit Defender (satisfied with it), Security Shield 2009 (slow). I just renewed to Security Shield 2010 on Sat. It was taking my laptop 4 minutes to load IE Explorer8, and up to 3 minutes to switch from thread to thread on the forum. I uninstalled the pgm. and am back to fast page loads. My laptop is a puny 18G hardrive, 750meg memory, with a 980mhz processor running XP home. I have more than 60% hard drive empty, and usually 500K mem. avail. What antivirus programs are forum members using that work well and don't tie up resources? I may be retired, but I'm still impatient!