| Sometimes a virus knocks out the Master
Boot Record MBR and you have to repair it. I have found that
when you have a drive with multiple partitions the record is not
always fixed with the correct drive letter. Example my vista
machine was not booting to drive F not C and all of the registry
entrys were looking for C so it was not loading all the profiles
correctly. To fix this I used these steps.
Boot from a ERD disk for factory disk in recovery mode goto Command prompt and reset the MBR I used Bootrec /fixmbr then I typed Bootsect /nt60 all f: /mbr /force so it would boot to the F drive
When vista loaded I need to switch the drive letters around so I loaded the registry using control alt delete and running task manager then using the run command typed regedit 1. Go to the following registry key: 2. Export the entire key MountedDevices look for lines like this using notepad "\\DosDevices\\C:"=hex:25,68,7f,69,00,40,b0,0f,00,00,00,00 "\\DosDevices\\F:"=hex:5c,00,3f,00,3f,00,5c,00,46,00,44,00 3. Now switch everything after the hex: from one to the other making sure no extra spaces should look like this "\\DosDevices\\C:"=hex:5c,00,3f,00,3f,00,5c,00,46,00,44,00 "\\DosDevices\\F:"=hex:25,68,7f,69,00,40,b0,0f,00,00,00,00 4. Re-import the file (dblclick on the reg file) and reboot. your F drive should now be C Drive Note: to reboot I held the Power Button until it turned
off then powered back on Also saw a command to use bootrec /rebuildbcd but have to use factory disk not ERD disk to repair the BootRecord they want you to also rename the c:\boot\bcd file Larry said to use bootrec /fixmbr and /bootrec /fixboot to fix master boot records. Did not work for me. XP Switching Drive 1. Go to the following registry key: 2. Export the entire key MountedDevices 3. on the right find the two drives you want to switch and right click on the \DosDevices\C: and choose rename rename to \DosDevices\X: find the other drive \DosDevices\I: and rename to \DosDevices\C: rename the \DosDevices\X: back to the \DosDevices\I:
If you need to change the entrys in the registry to match the new drive letter you created you will need this program to edit the registry to do a global search and replace. http://www.funduc.com/rtshareware.htm grab the 32 bit registry program or click here for file Do this before you reboot. 4. load the regkt program click on Registry and click on Search and replace Enter in the Search for I: and Replace with C: the replace button at the bottom 5. Exit the program open regedt32 and import the file that was
created with the regkt program
Interesting article on BCD Boot Mgr |
Craig
PS not responsible for this not working or any damage it may cause! Cloan
the original drive 1st for a backup.
Work from the cloan. Cloan it back if it works