Windows 7 Uninstall os on dual boot


New Member
Jul 21, 2010
I have a dual boot system with 2 installs of win7 one is onthe C: partition the other is L: which is on the same drive as the first, Iwant to uninstall the one designated C: both are active as far as I can tell, can I just go to disk managementand delete it or is there a better way? Will the remaining partition revert to C:? A screenshot is included. I would appreciateany input on this, Bob

Disk Management screen shot.jpg



Essential Member
Microsoft Community Contributor
May 25, 2009
Ada Michigan

To remove one of the operating systems you need to install "EasyBCD" and use it to remove the one you don't want from the boot menu.

If you don't do this your computer won't boot and you will have big problems.

Once you make sure that the computer boots directly into the copy of Windows you want, you can just delete the other one.

Be sure that it doesn't ask with one when you boot it up, and loads directly



Excellent Member
Microsoft Community Contributor
Oct 16, 2009
Your boot files are currently in the C: partition, and as Mike says, deleting it will stop your system from booting. But the boot files depend on an Active partition, which is C: right now. So even EasyBCD will not move the boot files as long as your setup is the same.

Making the other partition active, will allow a Startup Repair (run 3 times) to move the boot files to it, if you wanted to delete the entire partition. You do have some options as to how to configure your partitions, but make sure you have one partition designated as active before you try to reconfigure your boot.

As far as the L: question, since it appears your screen shot shows you as being booted into that partition, I will assume it will stay L: since it should have changed to C: when it became the OS (boot) partition.
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