Here is my recommended list of utilities for removing malware from a Windows computer. All of these tools are free although some may require you to register to download. None of these tools provide any real-time protection. For that, you’ll send to use a separate free or paid anti-virus/anti-malware client or service.
Top Malware Removal Tools
Malwarebytes Anti-Malware Free
https://www.malwarebytes.org/antimalware/
AdwCleaner (Free)
http://www.bleepingcomputer.com/download/adwcleaner/
Rootkit Removal Tools
Here are some useful rootkit removal tools for dealing with difficult to remove malware and viruses:
Kaspersky Lab’s TDSSKiller
http://usa.kaspersky.com/downloads/TDSSKiller (requires registration)
http://www.bleepingcomputer.com/download/tdsskiller/ (no registration required)
Norton Power Eraser
https://security.symantec.com/nbrt/npe.aspx
Trend Micro Rootkit Buster
http://www.trendmicro.com/download/rbuster.asp
Sophos Rootkit Removal
http://www.sophos.com/en-us/products/free-tools/sophos-anti-rootkit.aspx (requires registration)