Find Malware using Windows Defender
Windows Defender Offline Beta can detect malicious and potentially unwanted software, and then notify you of the risks and is able to scan for malicious code even before Windows boots. The new version is available in beta, in both 32- and 64-bit editions and you can run it off a CD, DVD or USB flash drive. This makes it possible to detect rootkits and other boot process malware.
Read more about Windows Defender here.
To download the latest Windows Defender 32-bit or 64-bit beta version go here: