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How to: Remove One Operating System From Dual Boot Windows?

More then one operating systems can be installed on a same hard drive. You can install two or even more operating systems on a single hard drive or on the same partition. For example you can install Windows 98 with Windows 2000 or Windows XP and also Windows XP with Windows Vista. It up to you if you want to install both the operating systems on the partition e.g. (both on C: drive) or on different partitions e.g. (Windows XP on C: drive and Windows Vista on D: drive). However, you will lose your system performance by installing more then one operating systems on a same partition or drive.

53979 500 375 300x225Now if there are two operating systems installed whether on the C: drive or one in the C: drive and the other on the D: drive, the system will give the choice of selecting any one of these OS at the start up. Both the root files of the two operating systems are stored on C: drive, so you can delete one any operating system with editing these root files. There is no any direct method to uninstall one operating system; you can do this only with format the partition or delete windows folder after editing the “Boot.ini” file.

dual boot

Follow the given steps to edit the Boot.ini to delete one operating system:

Step 1


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In case any problem after editing, first backup the Boot.ini file.

Step 2

Click Start button then type ‘Sysdm.cpl’ without quotes in Run option then press Enter for next.

Step 3

Now on the Advance tab, click on Setting under the Startup and Recovery area.

Step 4

Under the System Startup area, click on Edit button, and you will get a Notepad editable file.

Step 5

If you have installed two operating systems (windows XP and Windows 2000) on same hard disk then it will look as in Boot.ini.

Step 6

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)WINDOWS=”Windows XP Professional” /fastdetect
multi(0)disk(0)rdisk(0)partition(2)WINNT=”Windows 2000 Professional” /fastdetect

Step 7

According to above example, if you want to delete windows 2000 then delete the “multi(0)disk(0)rdisk(0)partition(2)WINNT=”Windows 2000 Professional” /fastdetect” line and save the file.

Step 8

But if you want to delete windows XP then delete the “multi(0)disk(0)rdisk(0)partition(1)WINDOWS=”Windows XP Professional” /fastdetect” line and save the file.

Step 9

At the end delete the operating system folder that you no longer require or format the drive where the other operating system contains.

Step 10

Now close the all programs and restart your computer after any changes to go into effect.

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