I scanned pokertime with both avast and avg and the scans were clean.
do you have avast and AVG installed ?

installing multiple AV programs can create all kind of mysterious windows errors and False Positive detections

see reply from quietman7
http://www.bleepingcomputer.com/forums/index.php?s=7c8217673a726b92cfc91ecfd4294a29&showtopic=260844&view=findpost&p=1441638

Removal tools for AV programs can be found here http://uninstallers.blogspot.com/