Q: When I start avast!, it opens a small blue window with the basic description of usage. There´s also a "Don't show this window next time" checkbox. But if I check it, I get an error "Object doesn´t support this property or method". What´s the solution?

A: This problem isn't actually caused by avast!. That behaviour is caused by a bug in Internet Explorer. Use Windows Update feature to update Internet Explorer and the problem will disappear.