ESET
I was using ESET Smart Security, in fact, it's one of the products that I was resell ing to my customers. I had a lot of difficulty getting it to play well in an Active Directory environment and it frequently consumed all the CPU time, even would totally freezing the two machines I was testing it on. Their tech support obviously doesn't monitor their forums and getting in touch with them directly is nearly impossible. I've since abandoned ESET in favor of Kapersky Internet Security 2009, which has excellent tech support and their agents actually speak American English. I was able to completely disinfect several client's infected machines where Trend and other removal tools have failed miserably.
