See the problem is he is using Vista and not XP
Do these steps in order and what ever one applies to you
If you have the Windows Vista installation disc, follow these steps to use the Startup Repair tool:
1. Insert the installation disc.
*** The computer must be configured to start from a CD or from a DVD. For information about how to configure the computer to start from a CD or from a DVD, see the information that came with the computer.
2. Restart the computer. To do this, click Start, click the arrow next to the Lock button, and then click Restart.
*** If you cannot restart the computer by using this method, use the power button to turn off the computer. Then, turn the computer back on.
3. Set your language preference, and then click Next.
*** In most cases, the startup repair process starts automatically, and you do not have the option to select it in the System Recovery Options menu.
4. Click Repair your computer.
5. In the System Recovery Options dialog box, click the operating system that you want to repair, and then click Next.
6. In the System Recovery Options menu, click Startup Repair to start the repair process.
7. When the repair process is complete, click Finish.
If the computer has preinstalled recovery options, follow these steps to use the Startup Repair tool.
1. Remove all floppy disks, CDs, and DVDs from the computer, and then restart the computer.
2. Press and hold the F8 key as the computer restarts. You must press the F8 key before the Windows logo appears. If the Windows logo appears, you must restart and try again.
3. In Advanced Boot Options, use the arrow keys to select Repair the computer, and then press ENTER.
4. Click a keyboard layout in the list, and then click Next.
5. Click a user name in the list, enter the password, and then click OK.
6. In the System Recovery Options menu, click Startup Repair.
7. When the repair process is complete, click Finish.
Hopefully this should automatically fix the boot up issue however
If there is a missing or corrupt file from the boot manager
1. Start Windows Recovery Environment (WinRE).
2. During Startup Repair, at the
Do you want to restore your computer using System Restore? message, click
Cancel.
3. Computer restarts, Startup Repair runs again for a total of three times.
4. At the
Startup Repair cannot repair this computer automatically screen, click
Don't send.
5. In
Windows cannot repair the computer automatically screen, click
View advanced options for system recovery and support.
6. At
System Recovery Options, click
Command Prompt.
7. At the Command Prompt, type
C:, and press ENTER.
8. Type
bcdedit, then press ENTER.
9. Under the heading
Windows Boot Manager, verify "
default {default}" exist.
10. Type,
bcdedit /delete {default}, then press ENTER.
11. Type,
bootrec /rebuildbcd, then press ENTER. Answer
Yes to any prompt by pressing
y, then pressing ENTER.
*** If this is run without deleting the default entry, the procedure fails.
12. Type
exit, then press ENTER.
13. Click Restart.
Hopefully these steps should rectify your issue, if it doesn't please post back straight away
Regards
Craig