Ankit Kumar Agarwal

This guide willl help you to remove 2nd installation of windows from your hard drive.
Just follow this step by step guide to get your 2nd windows installation removed withing minutes even from the bootup menu.

If you have got vista and XP and want to remove XP than the following method may not work.In such a case you may like to read how to remove vista
Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.

1. Start the Windows operating system that you want to keep.
2. To determine the Windows folder that you want to keep, click Start, click Run, type %windir%, and then click OK. Remember the folder that is opened. For example, the folder may be C:\Windows.

Note This is your “working” Windows folder. Do not delete or remove this folder from the partition.
3. In Windows Explorer, find the Windows folder that you want to remove.

Important Make sure that this folder is not the folder that you identified as your “working” Windows folder in step 2.
4. Right-click the Windows folder that you want to remove, and then click Delete.
5. Click Yes to confirm the deletion of the folder.
6. Click Start, right-click My Computer, and then click Properties.
7. On the Advanced tab, under Startup and Recovery, click Settings. The Startup and Recovery dialog box appears.
8. Under System startup, click Edit to modify the Boot.ini file.
9. On the File menu in Notepad, click Save As, and then save a backup copy of the Boot.ini file that is named Boot.old. (This is done to backup your old boot file)
10. On the File menu, click Exit to close the backup copy of the Boot.ini file.
11. In the Startup and Recovery dialog box, under System startup, click Edit to reopen the Boot.ini file.
12. In the [boot loader] section of the Boot.ini file, identify and then delete the line of text for the Windows operating system that you want to remove.
13.save and quit.

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And here is the rest of it.