Please help!!! System Guard Warnings have popped up on my computer repetitively-- literally one after another without stop and without any program having been opened before they popped up. What happens is that when the first warning appears, I click DENY but every time after I do that, another System Guard Warning immediately pops up with a different file name under "Modify File", and then I press DENY again, and then immediately yet another same warning with yet another file name -- and it goes on ad infinitum. I have pasted some of the warning windows below. Every time it pops up -- one after another -- there is a different .sys file listed. The sample that I have attached/ pasted below looks quite ominous, what with with files like NETBIOS.sys, USBHUB.sys, and (not pasted here) DISK.sys and the like. The only thing that is able to stop -- yet only temporarily -- this endless chain of these warning messages is to click "Terminate", but every time I do that, I immediately get a Microsoft Security Essentials warning message (pasted below) and my MS Security Essentials tray icon gives me a warning popup that it has shut down and asks me to start it up again. Then after a lapse of a number of seconds or minutes, the same endless chain of the Returnil System Guard warning messages starts up again -- and again can only be stopped by clicking "Terminate", which yet again shuts down MSE and brings up the MSE warning message (attached below). Any ideas why this is happening and how to fix it? Thanks!!