How to use MSConfig to remove an OS from a dual boot configuration.
A few weeks back I explained how to install Windows 7 in a Dual-Boot Configuration using a VHD file like the Windows 7 System Drive. A few days later I explained how to make Windows 7 in a Dual Boot scenario the primary boot OS. Now after receiving about 20 emails on the topic from readers, I guess it’s time to explain how to undo or delete the Windows 7 Dual Boot configuration. My guess is the testing is done and they are going to wait for the gold bits for Windows 7.
So, let’s get right to it. For your convenience, I’ve included not only the step-by-step instructions but also a how-to video.
How-To Remove an OS from Windows Dual Boot Config Screencast Video
How-To Remove an OS from Windows Dual Boot Config [Step-by-Step]
1. Boot into the Non-Windows 7 OS (original OS before you installed Windows 7 as a dual-boot). For most people, this would mean booting into your Vista install however I’m going to guess there might be a few who set up a Dual-Boot config with Windows 2008 also (me for instance).
2. Click the Windows Start button and type msconfig and press Enter (or click it with the mouse)
2. Click Boot Tab, click the OS you want to keep, and click Set as default
3. Click Windows 7 OS and click Delete. Click OK
What you just did was remove Windows 7 from the Windows Boot manager so now it will no longer show up when you boot the computer. Essentially, the computer is no longer a Dual-Boot System (2 Windows Versions installed).
The next steps are to just simply delete the Windows 7 VHD file.
Once you delete the Windows 7 VHD file all remnants of Windows 7 will be gone. Hopefully, this is how you installed Windows 7. If not, you will need to go to the System drive you installed Windows 7 and manually delete all the files and folders there. Be careful not to remove anything needed by the current/original OS you want to keep. If you didn’t install Windows 7 in a VHD file, hopefully, you installed it on its own drive so you can just format it.