This article was previously published under Q249085
This article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010.
The Windows 2000 End-of-Support Solution Center
is a starting point for planning your migration strategy from Windows 2000. For more information see the Microsoft Support Lifecycle
You may have to delete, and then re-create a primary
partition without disturbing data on Logical Drives in an extended partition.
This procedure may be useful in situations such as the following:
- Windows is installed in a logical drive on a second
(extended) partition, and the boot record for the drive C partition has become
- The drive C partition has been formatted by means of the
NTFS file system, and you want to format it by using the file allocation table
(FAT) or FAT32.
To use this procedure, you must have the following items:
- A current Emergency Repair Disk (ERD).
- A Microsoft Windows 95, Microsoft Windows 98, or MS-DOS
boot disk with a copy of FDISK.EXE and FORMAT.COM.
- The Windows 2000 CD-ROM. You may also require the Windows
2000 Setup floppy disks if your computer cannot start from the Windows 2000
- Do not use this procedure on dynamic disks.
- This process removes all the data in the primary partition.
Before you continue, make sure that you back up all the data that is in the
To delete, and then re-create a primary partition, follow
- Make sure that all the data on all the drives is backed up,
and that you have an updated ERD. To create an ERD, follow these steps:
- Click Start, point to
Programs, point to Accessories, point
to System Tools, and then click Backup.
- On the Tools menu, click
Create an Emergency Repair Disk.
- Click to select the Also back up the registry
to the repair directory to save your current registry files in a
folder in your %Systemroot%/Repair folder.
- Follow the on-screen instructions to create the
- Start the computer by using the Windows 2000 CD, or the
Windows 2000 Setup floppy disks.
Note: Do not start this process from Windows. You must continue by
using the Windows 2000 Setup floppy disks or the Windows 2000
- When Setup finds the previous installation of Windows 2000,
press N to install a fresh copy.
- Follow the steps in Windows 2000 Setup until you see the
screen that displays the existing partitions and unallocated space.
- Click to select the drive C partition, and then press D to
delete the partition. You receive the following warning message:
- Press L to delete the partition. A screen appears that
shows the existing partitions and free space, and lists Unpartitioned
space where the drive C partition used to be.
- Click to select Unpartitioned space
(formerly drive C), and then press C to create a new partition.
- Press ENTER to confirm the maximum size for the partition.
The screen that shows the existing partitions and free space appears again. The
screen lists drive C as "New (Unformatted)" where Unpartitioned
space used to be.
- Press F3 to exit Setup, insert the Microsoft Windows 95,
Microsoft Windows 98, or MS-DOS boot disk into the floppy drive, and then press
F3 again to restart the computer.
- At the DOS prompt, type fdisk, and
then press ENTER.
- Press Y to confirm large disk access.
- Click to select option 2, and then set the
drive C partition as Active.
- Press ESC, press ESC, and then press ESC again to exit fdisk.
- Use the boot disk to restart the computer.
- At the DOS prompt, type format c:,
and then press ENTER.
- Press ENTER to confirm the format.
- When the format is complete, type the volume label (this is
optional), and then press ENTER.
- Type fdisk/mbr, and then press ENTER
to update the master boot record (MBR). For additional information about FDISK /MBR , click the
following article number to view the article in the Microsoft Knowledge Base:
Using FDISK /MBR for Troubleshooting Windows NT Boot
- Use the Windows 2000 CD or the Windows 2000 Setup floppy
disks to restart the computer, and then when prompted, press R.
- Press R again to use the emergency repair process to repair
your installation of Windows 2000 .
- Press F to perform a fast repair, insert the ERD, and then
- When the repair process is complete, remove the floppy disk
from the drive, and then restart the computer as you typically do.
Article ID: 249085 - Last Review: October 30, 2006 - Revision: 3.3
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows 2000 Server