I have recently started to have intermittent problems with Copy and Paste not working between programmes. For instance, if I draft something in Word 2007 and then try to copy into my e-mail (Fastmail.fm) or if I copy something from a web page and try to past into Word it won't work. I normally use the keyboard short cuts, but it doesn't work using the mouse or menu commands either.
Rebooting fixes it sometimes, but not always and now it is happening within programmes as well. I have just tried to copy something in Word with the clip board window open and nothing happens; the clip board shows as empty.
I have Kaspersky running all the time, have Spybot Search and Destroy and Ad=Aware running once a week and Windows Defender running in the background. I have just run MBAM and it came up clean, so I don't think it is a Malware issue.