I downloaded a mpeg file to my desktop. I cannot open it with any programme and cannot delete it. If I right click the file it only displays send to options and open with... (no properties option). It won't let me put it into any other file or move it anywhere! I am wondering that it might be a Trojan or other nasty file. Is there any freeware programme I can download to get rid of this bug?
I would suggest that you do these scans (if not done already). Then reboot your system into "Safe Mode" (while your computer is booting, keep tapping F8, until you get a list of options. From these options, select "Safe Mode" and press enter)