i recently got sum internet security malware/spyware shit, n this is wot I did, disable system restore. restart in safe mode. scan with as much anti v software u can, I think combo fix and spybot search and destry did it for me.
also if u always get OPEN WITH after u click on a program
type in "services.msc"
and look for the service called "messenger"
right click, properties, change the settings so its on automatic, and runs by itself, apply.
right click it again, and start the service....
that fixed it for me anyway....
peace out :)