Agotthelf
Hello and welcome here!
Please tell us. which antivirus do you use?
Some suites have troubles, with our service partition and cause false positives.
_________________________________________________________
Follow @LenovoForums on Twitter! Try the forum search, before first posting: Forum Search Option
Please insert your type, model (not S/N) number and used OS in your posts.
I´m a volunteer here using Yoga 13, T510, X220t, T61.
TIP: If your computer runs satisfactorily now, it may not be necessary to update the system.
Agotthelf
Hello,
I would do a check with Norton or Antivir.
I often heard about this issue, but it was never a virus, always the antivrus suites.
_________________________________________________________
Follow @LenovoForums on Twitter! Try the forum search, before first posting: Forum Search Option
Please insert your type, model (not S/N) number and used OS in your posts.
I´m a volunteer here using Yoga 13, T510, X220t, T61.
TIP: If your computer runs satisfactorily now, it may not be necessary to update the system.
A previous post about this basically went unanswered, take a look at what they found: http://forums.lenovo.com/lnv/board/message?board.i
I get the feeling that they're coming up because they overwrite system files, so they would fit the description of a Trojan, but that's not there purpose. Many virus are made by copying from legit programs like these, and the antivirus providers have to flag all possible threats, even the original programs.
As the user, you should add them to the trusted list, just incase you need to use one of them, cause if it gets blocked, it could leave you with a useless machine. I've had it happen before, I had to do a full reinstall, all original data lost. We had to get a whole new license to a pretty expensive program, and that was no fun, because I got most of the blame. 
