- Click on Start Menu.
- Type slui.exe 4 into Start Search, and then press Enter.
- Select your country
- The screen will show you several phone numbers that are available
- Call the no and input whatever that 50 freaking long installation ID into the system
- Microsoft will detect whether you had been installing the same copy of windows to the same pc or not..If it is, you will get another freaking long confirmation ID..
My advice..Make sure you backup everything before you reformat your laptop..especially softwares that you paid for..Write down any important information about the software like the activation key or registration confirmation key or whatever..In case you'll ever need them..