start-->> right click my computer-->> properties-->>Advance-->>startup and recovery-->> settings-->> Edit.
boot.ini notepad file will open..with code something like this:
Code:
[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="Microsoft Windows XP Professional" /noexecute=optin /fastdetect
In your case, there must be two line starting like:
"multi(0)disk(0)rdisk(0)partition(1)\WINDOWS...... ........................"
Delete the line, which contain OS name which you have formated and want to remove.Be careful..remove the formated OS name only.