miroslav
Cosmic Cowboy
I have used MS Security Essentials for years on all my W7 PCs and never really had a problem. I have HAD problems, quite a while ago.
Goodbye Microsoft Security Essentials: Microsoft Now Recommends You Use a Third-Party Antivirus
"In October 2012, Microsoft Security Essentials scored so low that it lost its AV-TEST certification. In June 2013, MSE received a zero protection score from AV-TEST — the lowest possible score. It’s also come last in other recent tests, including one by Dennis Technology Labs."