can somebody from my VPN see my screen, if yes how to stop this?

"I am using Windows 7 Pro and I think
that somebody frommy VPN could see my
screen how can I stop this?

Ultimately, if this is a company laptop and you're working on company time, they can do whatever their HR policies say they can do so trying to thwart something like this is an exercise in futility and could be ""career limiting"". Can you tell us:

Who do you think is spying on you?
Why do you think they're spying on you?

Nonetheless, to offer a pertinent answer...

For someone to access your PC in that manner, two major things must happen. First, they have to have knowledge of an account on your PC with sufficient privileges to install a service like VNC, Dameware etc. Second, your firewall must be set to allow traffic on the necessary ports.

To take care of the first issue, delete all unnecessary user accounts, disable the local administrator account and change all necessary user accounts' passwords to something complex. The second issue is a trivial matter of ensuring all unnecessary ports are blocked with a software firewall.

However, if your machine is a member of a domain, the machine is accessible to any member of the Domain Administrators group. You can do nothing to prevent this. You could always disconnect from the network that you suspect the ""spying"" is coming from."

The fact that your computer is in VPN does not allow anyone to do anything with your computer. It is however possible that there are programs running on your computer that log your actions or allow someone to access your computer remotely (eg. RealVNC, TeamViewer) and/or that your file sharing allows someone to access your files and folders.

"A good firewall will block any attempt to access your computer.

However, the network administrator might have the freedom to install software on your computer that will log your actions.

If you wish to lockdown your installation, you might have a look at AppLocker, with which it is possible to prevent users who have administrative permissions to the system from running administrative tools. A very extensive article about it is found in An Introduction to AppLocker."