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How to unmark active partition?

I made partition by using Disc manager, and accidentally marked C drive active. After restarting an error message is showing. I cant get into DOS command prompt , even by hitting F8. I used my recovery disc, but it tells me "No OS found!" . My laptop ACER has come with a pre-installed Windows 7 home premium 64bit. Can i solve this problem without formatting C drive, bcz i didnt make back up of many of my important documents stored in C drive. Plz help
6 answers Last reply Best Answer
More about unmark active partition
  1. Best answer
    run cmd from dvd

    type in:

    diskpart

    type in:

    show volume

    Find out the volume then type in:

    select volume x

    x being the volume number

    then type in:

    inactive
  2. Pyree said:
    run cmd from dvd

    type in:

    diskpart

    type in:

    show volume

    Find out the volume then type in:

    select volume x

    x being the volume number

    then type in:

    inactive


    how to cmd from dvd..? should I insert a random dvd or win 7 installer..?
  3. ariokusuma said:
    Pyree said:
    run cmd from dvd

    type in:

    diskpart

    type in:

    show volume

    Find out the volume then type in:

    select volume x

    x being the volume number

    then type in:

    inactive


    how to cmd from dvd..? should I insert a random dvd or win 7 installer..?


    Insert win 7 DVD. Boot from CD. Repair windows.

    Then click around till u find the command prompt.
  4. hi Moshiur
    I got the same problem on my pc, a while ago i went to disk management and made one partition ACTIVE; unfortunatly all my partition became active and when i tried installation disk for reinstalling win7 all the partition show DYNAMIC PARTITION and are unable to install win7 on them, pls help me find the solution, I guess both of our prbs has started frm same mistake though u may help me,
    thank you
    regards
    Dev
    email- d29meh29@gmail.com
  5. Thanks so... much pyree , it really wprked and helped me a lot .
    thanks again .
  6. Hi guys , Thanks this helped. BTW you don't need to run cmd.exe from DVD just right click and select run as administrator
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