Windows XP

What type of environment are you running? Active Directory? Work Group?

If you're running on a domain, you can gain access to their workstation rather easily. However in a work group environment, you'll need remote access software (such as ultraVNC) running in order to gain access and control is remotely.

Windows 2003

Thanks.... But what i am aking is how do i do the uninstall?

There's no simple "remotely uninstall this program" feature... That's why I ask about your network environment. You have to be able to access their machine remotely through some form of protocol, whether it be through remote desktop, VNC client, logmein, etc... If you're not running a Domain, it's much more difficult to gain access without them knowing about it.

"The big thing is I don't want any user to know it is being done" -- do you mean by this that you want to not interrupt the user....or do you mean that you are trying to hide what you are doing from your users?  If the latter, I suggest you stop.  Anything IT does should be in line with company policies and procedures.  These policies and procedures should be open to all employees.  That way when the user comes up and says "where did x go to" the IT staff can respond appropriately without getting into an argument with the user.

Now, as to your specific question there are a lot of ways.  It depends on the specific application though.  A few methods I've found to work are:

1 -- Set up a group policy to control settings on the system.
2 -- Run a logon script to uninstall the app from comand line if silent mode uninstallation is supported.
3 -- Run a logon script to delete app from hard drive and clean registry settings.
4 -- Set up a software install policy that will "upgrade" the targeted app to something else you do want in it's place.

MDS-Cos thank you for your impression of the IT code of ethics. We  want to do the install during the day while they are working. I am not sure about where you have worked sir but know matter what app you uninstall if it a game to word they need it back the sec you uninstall it. so we are doing things diffidently here. But the next time we work together i will remember that.

you can use this:
Runas /user:DomainAdminAccount@DOMAIN cmd

This really depends on the application you wish to uninstall, if it supports a silent uninstall and if it was installed from an MSI, you have the source available.

For example,

If you have the source MSI file, I would trying the following.

1. Copy the file to the users c drive via the UNC path.
2. Download the PsTools suite from the Microsoft website and install it.
3. Run the following command from your pc. psexec \\remotepcname c:\windows\system32\msiexec.exe /x c:\filename.msi /q

And for a larger enviroment I would look into something like Microsoft SCCM to manage your application packages, licenses, installs and uninstalls for you.

http://en.wikipedia.org/wiki/System_Center_Configuration_Manager

thanks