Microsoft Security Essentials has warned me about the fact that my Windows pc contained malware and that it had cleaned my system. Time to do a test with some online virusscanners. First, I've tried TrendMicro Housecall. Housecall found nothing and told me my system was safe and didn't contain malware. Then, I tried Eset Online scanner. Eset did find the specific malware on my Windows pc. This, while Microsoft Security Essentials told me it had deleted the malware and TrendMicro Housecall told me my system was safe. Well done Eset !!