I recently contracted some pretty serious malware on my system, including rootkits and an FBI scamware that accused me of taking part in illegal activities. I have read several things online and tried a number of different methods, and finally I seemed to be free of everything.
List of software used (not necessarily in this order): Avira Free Antivirus (the original software I'd hoped would protect me); rkill; TDSSKiller; MalwareBytes; Autorun Eater; HitmanPro Trial scan; F-secure online scanner; Zone Alarm free version; SUPERAntiSpyware free version.
I originally scanned the computer with Avira, then used rkill and MalwareBytes. After that I did a system restore. Scans then wouldn't pick up anything, but my active defense was disabled and I couldn't update the virus definitions, making it obvious that something was still going on. I continued with F-secure and SUPERAntiSypware, but still couldn't get rid of that problem. After further reading, I tried TDSSKiller, and from there it seemed like things really freed up. Avira detected a number of different bits of malware and quarantined them. I then used HitmanPro, which really knocked out a lot. But strange things continued to happen. Avira started thinking hundreds of files had been infected. I let it quarantine them at first, but then restored them and did a full scan. After this it only seemed to believe some of them were viruses. I wondered if Avira was having problems, so I uninstalled it and installed Avast, which required that I remove MalwareBytes. After a full Avast scan and another F-secure scan, I seemed to finally have eliminated everything. Things seemed okay on the computer, though I've stayed away from banking and such on this computer. But after a week or two, Avast is blocking malicious sites, sometimes every 2 or 3 minutes, and lasting for several minutes. Then it seems to leave me alone. This often starts after I start Windows Live Movie Maker. Avast tells me that it is blocking these sites that I'm clearly not going to, tells me that programs like Google Chrome and Movie Maker are the programs trying to access them, etc. Further use of the same scanners including TDSSKiller, Avast, and HitmanPro seem to turn up nothing. Am I still infected? Are all my good programs infected? How can I get rid of this?