Accidentally marked a partition as “Active”, rendering computer un-bootable

Posted: March 27, 2012 in Uncategorized

Hey it happens to the best of us – you right-click and click something that just “felt” like the right one because you were moving too quickly…

First, don’t re-boot if you can help it. The solution is much easier that way.  If not, you’ll have to read down further for the solution.

If you haven’t re-booted yet

  • Click start, run, type “cmd”, press enter
  • Type “DISKPART”
  • Type “LIST DISK”
  • Look for the drive that you know is the one with the partition you marked active, you’re going to have to rely on the size of the disk
  • Type “SELECT DISK n” where n is the number of the disk
  • Type “LIST PARTITION”
  • Look for the partition you marked active. Again, you’re going to have to rely on size. If there’s only one it’s easy.
  • Type “SELECT PARTITION n” where n is the number of the partition
  • Type “INACTIVE”
  • You’re in the clear now, you can close the two command windows and re-boot safely

If you HAVE re-booted…

Well you need access to another computer and internet connection.  Follow my instructions for creating a Windows XP boot CD and use the same “DISKPART” instructions above to perform the same procedure.  You need to follow the instructions on that page for making a CD, not a USB, because the CD will give you all the tools you need, including DISKPART.  Diskpart will be one of the options in the menu when you boot off that CD.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s