The free Svchost Process Analyzer lists all svchost instances and checks the services they contain. This makes it easy to uncover Svchost worms like the infamous Conficker worm.
Svchost Process Analyzer is a 100% freeware program from www.neuber.com. There is absolutely no installation required. Simply download and run the software.

Download
http://www.neuber.com/free/svchost-analyzer/SvchostAnalyzer.exe