Troubleshooter of Error: Deleting one of two operating systems on same PC

Deleting one of two operating systems on same PC

My computer originally came out with Windows Vista, but after a while I decided to install a version of Windows 7 onto the same computer.
That resulted in me having two operating systems on the same PC that I can switch between, both on their own hard
drive.

Though it seems now that the new Windows 7 installation is having some difficulties with the PC and I therefore want to remove it and keep the Vista.
How can I do it without removing anything important?

Thanks

Keys to the Problem Deleting one of two operating systems on same PC

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Manually editing the Windows registry

Manually editing the Windows registry to remove invalid MACHINE_CHECK_EXCEPTION keys is not recommended unless you are PC service professional. Incorrectly editing your registry can stop your PC from functioning and create irreversible damage to your operating system. In fact, one misplaced comma can prevent your PC from booting entirely!


Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

To manually repair your Windows registry, first you need to create a backup by exporting a portion of the registry related to MACHINE_CHECK_EXCEPTION (eg. Windows Operating System):

  • Click the Start button.
  • Type "command" in the search box... DO NOT hit ENTER yet!
  • While holding CTRL-Shift on your keyboard, hit ENTER.
  • You will be prompted with a permission dialog box.
  • Click Yes.
  • A black box will open with a blinking cursor.
  • Type "regedit" and hit ENTER.
  • In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
  • From the File menu, choose Export.
  • In the Save In list, select the folder where you want to save the Windows Operating System backup key.
  • In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
  • In the Export Range box, be sure that "Selected branch" is selected.
  • Click Save.
  • The file is then saved with a .reg file extension.
  • You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.

Recommended Method to Fix the Problem: Deleting one of two operating systems on same PC:

How to Fix Deleting one of two operating systems on same PC with SmartPCFixer?

1. You can Download SmartPCFixer here. Install it on your computer. When you open it, it will perform a scan.

2. After the scan is finished, you can see the errors and problems need to be repaired. Click Fix All.

3. The Repair part is done, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in SmartPCFixer. Like dll downloading, windows updating and print spooler error repair.


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