Question : VNC Issues with DOMAIN connected PC's

I am having an issue using VNC that when I first connect to any PC through VNC (XP, Win7) I can grab the mouse functions and click on an open program or open a program or window.  But once I do this I lose all functionality to open, close move or do anything with any programs or windows on the screen.  The only way to resolve functionality is to have the user press ctrl+alt+del and then hit cancel.  By doing this I am then able to use VNC with issue.  Again this seems to only effect domain PC's.  I have tried VNC from a PC not on the Domain and the issue doesn't seem to plague that PC and is able to move around the VNC'd PC without any issues.  Also had an outside colleague VPN into the system and use VNC without issue.  Have also tried to VNC to a PC not on the domain from a PC that is and have had no issues.  This problem started about a week ago and I cannot seem to find a cause.

Answer : VNC Issues with DOMAIN connected PC's

your bets option then may be to try this on a pc on the domain and then remove the PC from the domain and try it again whenits running locally. this is the only way you can prove if the domai is the issue.
If it is the domain check your group polcies. something must bemessing with the settings. proabably firewall based.