Can't troubleshoot your computer and want to ask for help from others that are only available on the internet? Let them control your PC!
The easiest way to do that is to install TeamViewer. Get it from here.
Install and run it.
If you want others to control your Pc, give them your ID and Password.
If you're the one who will control other's Pc remotely, ask for his ID and Password.
Enter your Partner's ID, and click "Connect to Partner".
Enter his password.
Wait for it to connect and you should see his desktop right on your Pc.