First:
How to access Safe Mode:
Reboot your computer while holding down the F8 Key. At the Advanced Options Menu select the option for Safe Mode and press Enter.
How to access Last Known Good Configuration:
Reboot your computer while holding down the F8 Key. At the Advanced Options Menu select Last Known Good Configuration.
If this doesn't work we move on to the next Revcoery console:
The Recovery Console is a set of tools which run from a Command prompt. If your system is formatted as NTFS then these tools can help you manage the partition.
Reboot your computer while holding down F12- This will give you an option to boot from disc: Select "4" to boot from cd and it will ask you to hit F1 and to hit any key to continue cd boot.
Let windows run- Soon a Blue scree will appear:
To run the Recovery Console from CD boot with the Windows XP CD and select "R" at the Welcome Screen.

The screen will switch to black and you will be asked which installation to log on to. If you only have one installation you will press "1". Remember that numlock is off at this time.

Next you'll be prompted to enter your Admin password. By default it is created blank so just press Enter.

At the C:\Windows command prompt type "Help" for a list of commands you can use.
How to Repair the Boot Sector:
If XP won't start it may be due to a damaged boot sector or a missing or corrupt ntldr or ntdetect.com files.
To replace damaged ntldr and ntdetect.com you can copy fresh files from the XP CD using the COPY command. Boot with the XP CD and enter the Recovery Console (as above). At the Command Prompt type the following (where "X" is your CD-Rom drive letter) allowing the files to overwrite the old files
COPY X:\i386\NTLDR C:
COPY X:\i386\NTDETECT.COM C:
To repair a damaged Boot Sector at the command prompt type FIXBOOT and press Enter. Then answer "Y"
