When someone connects to or takes control of my computer, how are my privacy and computer security affected?
When someone uses Windows Remote Assistance to connect to your computer, that person can see your desktop, any open documents, and any visible private information. In addition, if you allow your helper to control your computer with his or her mouse and keyboard, that person can do things like delete files or change settings. So only allow people you trust to access or share control of your computer.
Warning: Before you allow someone to connect to your computer, close any open programs or documents that you do not want your helper to see. Watch what your helper is doing. If at any time you feel uncomfortable about what that person is seeing or doing on your computer, click Cancel, click Stop sharing, or press the ESCAPE key to end the session.
Note: This information provided by Microsoft.