Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have 6 users seated on a pod of desks all going through a basic Netgear gigabit switch which then links into our main Netgear 48 port switch up in the server room. In the past week or so 3 of these users (all sat in the same side of the pod) have experienced a problem where if one of them copies some text, the other 2 users paste, whatever was copied from user A will be pasted onto user B + C's machines.

We've tested this across all 3 users machines and it doesn't matter which one copies; the others can paste it. The issue doesn't occur when copying pictures, video or music, etc. No software to add this functionality into Win7 has been installed so I'm wondering if anyone has come across a similar situation before.

share|improve this question
Restore the default image to these machines to verify software was not installed, because this behavior, is not a feature of Windows itself. Access to the clipboard is a protected mechanic in Windows and requires user permission when done through software ( unlesss the permision was already granted ). – Ramhound Sep 10 '13 at 14:48
Have you used imaging software to install these machines? Are they exact copies? – SPRBRN Sep 10 '13 at 14:53
No imaging software was used they were all individual installs and these machines have been working without issue for months. – Dave Sep 10 '13 at 14:55
@Dave - There has to be third-party software installed. Try switching the ports on these 3 devices with the other 3 devices. See if you can replicate the issue against the following configuration where side X is the problem child and Side Y is the golden boy ( in other words the side without the prblem ) x y x y x y – Ramhound Sep 10 '13 at 15:08
wha tar ethe users doing? Are they all logging into an RDP server or alike? Does it happen across all programs? Does is happen on the suspect computers for other users? How about for the suspect users on other computers? – Ƭᴇcʜιᴇ007 Sep 10 '13 at 15:23
up vote 1 down vote accepted

It appears that in this case TightVNC was the reason the clipboard-data is transported over the network to other users.

The 3 users who had the problem of a shared clipboard over the network all had a session with TightVNC open to another machine which displays call stats.

TightVNC shares the clipboard with the machine it's connected to. So each clipboard action of the user is send to the connected machine, who in its turn sends it back to the other connected users.

To prevent clipboard sharing with TightVNC you can disable clipboard sharing. On the client/user machines check the Disable clipboard transfer option in the "Connection options"-dialog.

Connection options

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.