Microsoft operating systems defaults comes with NetMeeting functionality for real-time collaboration,conferencing and for file, application, and desktop sharing from Windows 95 through XP, Windows Vista replaces NetMeeting with Windows Meeting Space.

There is a hotfix from Microsoft that allows you to install NetMeeting 3.02 on Windows Vista PC

Hotfix installation informationTo install NetMeeting 3.02, follow these steps:

1. Extract the NetMeeting-KB927853-x86-ENU.msi file from the hotfix package.
2. Double-click NetMeeting-KB927853-x86-ENU.msi to start the NetMeeting installation program, and then click Next.
3. Review the software license terms, and then click I accept the terms in the License Agreement.
4. Click Next, and then click Install to install NetMeeting.

 User Account Control permission If you are prompted for an administrator password or for confirmation, type the password, or click Continue.

5. When NetMeeting is installed successfully, click Finish.
6. Restart the computer when you are prompted to do this.

To start NetMeeting, follow these steps:

1. Click StartStart button, type run in the Start Search box, and then click Run in the Programs list.
2. In the Open box, type conf, and then click OK.
3. In the NetMeeting dialog box, click Next, and then follow the remaining steps to configure NetMeeting.