باید MBR رو تعمیر کنی. اینم مراحل تعمیر از رو سی دی یه ویندوز :
HowTo: Fix the Master Boot Record
1.
Insert Windows 2000/XP Setup or Installation CD
2.
Restart your Computer
3.
If you see this message, “Press any key to boot from CD…” press a key to start the computer from Windows CD.
4.
After a few minutes, you’ll see Windows Setup Menu. Press “R” key to start repair Windows XP installation using Recovery Console.
5.
Microsoft Recovery Console will start.
6.
If you’re prompted to enter a number related to the Windows XP installation that you need to repair. Most likely “1″ if any.
7.
Enter your Administrator password, if you’re asked.
8.
At the Recovery Console Command Prompt, type “fixmbr” and verify that you want to proceed.
9.
Remove Windows 2000/XP Setup CD from CD-ROM.
10.
Type “exit” to restart your computer.
If the problem still isn’t solved, repeat the steps above but type “fixboot” instead of “fixmbr”.
اگرم میخای از رو سی دی یه اوبونتو تعمیر کنی می تونی تو فروم یه سرچ کنی.