OK, I am not the easiest when it comes down to software and to be honest I heard nothing but the greatest things of Boclean. I am a proud owner of Ewido too (and this baby is very gentle with me, I like it very much). Since I was thinking that Ewido has only an on demand memory scanner and a on demand/on access scanner (doing a great job) I was thinking bout Boclean since it is only but a memory scanner... to make a long story rather short : now I have a resident memory scanner (Boc) and a resident on access/on demand scanner (ewido) I am fairly pleased now and covered for years have a wonderful evening p.s. no slowdowns what so ever and glad I purchased it. Inf.