I'm afraid I have a rootkit on a laptop. See discussion here. As the virus and rootkit guys can't find anything the suspect a network problem. Hence this post.
The initial problem was and still is: a repeating 'login faild from <IP>' in my router log. The <IP> changes with that of the laptop. We already performed tasks with FRST, roguekiller, minitoolbox, tdsskiller and aswMBR.exe. Furthermore I did a full file (attributes) comparison between offline and online files-list. All details can be found in the post mentioned above.
So currently I'm stuck.
Anybody any ideas?