Just got back from holiday. After starting up the first windows7 PC it suddenly showed that the antivirus was turned off and that my computer was at risk. Within NIS it suggested to reactivate.
I removed NIS2011 with the removal tool and installed it again. After some live updates it is running allright with 124 days left.
I thought I should have to activate again (after installing) but it did know by itself that there were 124 days left (how does that work?).
Does anyone know why this problem occured? Do I have to do more to be certain everything is allright and secure?
The same problem occured with 2 other PC's (one windows7 and one Vista), an other windows7 pc didn't have this problem.