Probably the most used functions on a PC are copy and paste, or cut and paste. Well that's how it is for me anyway. Ever since I reinstalled my Windows (i.e. Repair from the CD), this error kept happening. I cannot copy and paste anything (including text, files, pictures, ANYTHING). Even when I used the windows shortcuts Ctrl+C and Ctrl+V or Ctrl+X, It still fails to copy. Right Clicking functions also not working. At times, when I copy something and try to paste, in the right-click context menu, the paste item is available, but when I click it, nothing happens. Other times, when I copy something and paste, the "Paste" menu item is greyed out. More Details: Drag and drop WORKS, but at times I am in total need for Copy/Paste I also have a program called TotalCopy, which copies files without using the Windows Explorer interface (it's an external program) This problem is not always happening. I CAN sometimes copy/paste. Other times I CAN'T. When I Can't copy or paste, I notice that when I log-out from windows and then log back in, the copy/paste actions work, but this can be very hassle-some and isn't really a solution, nevertheless it's still worth mentioning.