I've noticed twice in the past 6 months that my router's admin and password have been changed, and I keep having my credit cards get hacked. Is there a way of determining if there is a piece of malware on one of my 4 computers that is causing this to happen. Unfortunately I couldnt' login to my router to see what settings were being modified because my user id and password are being blocked. I reset the router back to factory defaults last night and added an even more complex user id and password. I'm absolutely positive I've entered the correct user and ID and password multiple times so there is definitely something (worm) causing my issue that the tools I have at my disposal cannot find.
You can find more details here: http://www.bleepingcomputer.com/forums/t/598617/wireless-settings-being-changed/#entry3880732