How to format C: before reinstall Windows 7?


  • I installed Win 7 on my new computer once, and I want to reinstall it.

    How do I format my hard drive before reinstall Windows 7?

    Thursday, November 5, 2009 5:11 PM


All replies

  • Boot from the DVD, you'll want to perform a custom install. Drive options (advanced) will give you the option to format your drive.

    See for below for a guide

    or the very poor Microsoft instructions
    • Proposed as answer by Techwrighter Friday, November 6, 2009 2:41 AM
    • Marked as answer by maoxmao91 Saturday, November 7, 2009 6:02 PM
    Thursday, November 5, 2009 7:28 PM
  • Rather than use the 'Format' command, it would be best to instead first DELETE the relevent partition, and then to CREATE a new partition of the same size, in the resulting free drive space.  A format will be performed as part of the install procedure, without the need to actually issue a 'Format' command.

    Format by itself can potentially leave residual problems in the drives MBR.  Delete/recreate partition doesn't have such potential problems.  (that's as I understand it all, anyways.)

    Regardless, the notion of 'formatting' a drive to clean it up is a notion which belongs back in the Windows 9x era!  Delete/recreate partition is a far preferable approach to take.  The relevent 'buttons' are found same place as the 'Format' button, during the Windows install routine.

    • Proposed as answer by Techwrighter Friday, November 6, 2009 2:41 AM
    Thursday, November 5, 2009 9:29 PM
  • Thanks, it really helped.
    Saturday, November 7, 2009 6:03 PM
    • Boot from your installation media, wait for welcome screen, choose language, then Install now
    • Select Custom (advanced) install, delete/create partitions to meet your desires, than quit by closing window (say Yes to Cancel windows installation)
    • Now choose Repair your computer. Leave Use recovery tools... ticked, click Next
    • Click on Command Prompt
    • now you may format your drive

    (continued) If you're not sure which drive letter to format

    • type "diskpart"
    • type "list volume". You can see your target drive by drive capacity and other info. Look for the value in column "Ltr". For me it was "E".
    • type "exit" to leave DISKPART tool
    • now you can format your drive by typing "format e:" for example
    Sunday, August 16, 2015 3:31 PM
  •  i couldn't install win 7 in my laptop , actual problem is no option for format the drive . what to do? kindly help me out of this issue
    Wednesday, September 30, 2015 7:41 AM