That is a strange problem. What AV and firewall are you using?
The event viewer may give some more information.
1. Click Start
2. Type eventvwr.exe
3. Press enter
4. Search through the groups for errors and warnings.
5. Double click on each error and or warning.
6. Locate the copy to clipboard button,
(under the two arrows)
7. Let us know what you find. (paste the results)
I would run some free online virus scanners.