I've been using Kaspersky for a few years, home and business. Never had any problem with it. It's good robust well written software.
Unlike the Norton/Symantec !!!!! which messes up the machine and occassionally throws up compatibility issues with applications. Same comment for McAfee. These programs routinely come on cheap laptops in teh form of 30/90-day trial versions, and are a pig to remove; verging on impossible if you wait until the free period runs out.
Recently I have been using Avast and it seems to work. It's free, which is pretty good. I suppose they hope to make money on the upmarket versions.