Restoring windows to original point, can't find restore point

The first time I reinstalled, it was 32 bit by accident and I entered my product key.
The second time, it was 32 bit, didn't enter product key
The third time I got it right, and now it won't accept my product key. In addition, it says that there will be charges for support on microsoft's website. I don't know what to do, please help?

Which method did you use to install?

Have you now installed the 64-bit version?

Try the automated activation service thus:

Click Start then type slui.exe 4 in the Search field.

Press Enter to open the Activation window, select your region from the drop-down list, and then call the freephone number.

You'll be given instructions via an automated activation wizard.