till yesterday. it was ok. since today morning, this problem appears. when i double click a folder to open it, it asks for permission to open with windows command processor. if i click on yes, a command prompt appears and commands keep on scrolling. if i right click on the folder, then the first option that comes is "take ownership". i am using microsoft security essentials. i have scanned with that as well as malwarebytes antimalware but the problem persists.