Dual Boot Error (Win7 and Win XP)

Have you tried using the one-time BIOS Boot Menu key to trigger the other OS HD? I would make sure I'm trying that correctly first. It will be the same key used to trigger a DVD to boot.

If this will not work then the procedure is to install EasyBCD to Win7 to add XP to the Boot Menu - nothing more is needed.

If you've lost the Win7 boot now, then mark its partition Active, set Win7 HD first to boot in BIOS setup, reboot into Win7 DVD or System Repair Disk to run Startup Repair - Run up to 3 Separate Times.

You may need to unplug the XP HD to run the repairs if Win7 will not start otherwise. In some cases it might repair the Dual Boot so I'd try the Repairs with both drives first.

@ David and Greg

Thank you for the help.
The startup repair option in Win7 bootable DVD worked like a charm. As soon as repair was finished and RESTART was done,it showed me with OS Selection page Windows and Windows XP.

I was bit curious that what changes it made in these repairs ? coz when i checked the boot.ini files again,they are same as earlier(those i posted)

It reasserted the Win7 boot that was taken away by moving the bootloader to XP. Then it wrote XP into the Boot Menu.

Again, all that is needed with EasyBCD is to add XP from Win7. If XP has already stolen the boot then repair and start Win7 first to do this.

@greg
yeh,i had followed the tutorial steps and installed EasyBCD from Windows 7 and added the XP entry there.. and then came the boot.ini error at startup (no boot loader)

but now startup repairs made all good (and directly OS Selection menu was appeared without going to EasyBCD again)

still one interesting thing happened during repairs... (i had kept Win XP HDD plugged in)
when windows setup was searching for installed windows , it showed that it found windows on G: drive, and not on C: (though i had set my Win7 HDD as primary BOOT HDD)

i was wondering whether my system will fail to boot if i remove either Xp or Win7 HDD due to some reason for some temporary time period (and tried to boot in single windows with only one HDD present..any one )

Post back a screenshot of Disk Management - Post a Screen Capture Image - Windows 7 Forums
and we will tell you what to do to unplug each HD if needed.

This is why its preferable to use the one-time BIOS Boot Menu key to boot each OS, instead of the Windows Boot Menu which often makes one OS fail to boot if the other is unplugged.

gregrocker said:

Post back a screenshot of Disk Management - Post a Screen Capture Image - Windows 7 Forums
and we will tell you what to do to unplug each HD if needed.

greg..i have attached the screenshot in my second post of this same thread.. (https://www.sevenforums.com/attachmen...ment_winxp.jpg)

and about BIOS key..my motherboard is old 845GVSR and it wont allow me to select between 2 hdds.(it will bring up 1HDD,1CD/DVD and 1 removable device in booting options list.

The System flag is on XP partition signifying that it is booting both OS's now, so Win7 will not boot itself until it has its own System boot files rewritten and holds the System Active flags on its partition, too.

To make both HD's independently bootable, first install EasyBCD to Win7 to delete the XP listing on the Edit OS Menu tab.

Then power down to unplug the Win7 HD to confirm the XP HD will boot itself. If so go into XP Disk Mgmt and mark it Active which it should already be anyway since any System drive should also be Active. Reboot to confirm it starts.

Then power down to swap the Win7 HD for the XP HD. Boot into the Win7 DVD or Repair CD to run Startup Repair - Run up to 3 Separate Times until Win7 boots on its own and holds the System Active flags. This is the only method that covers all parameters in writing the boot files to Win7.

Now you can power down to plug back in the XP HD, keeping Win7 set first to boot. Start Win7 and from EasyBCD add XP to the Boot Menu on the Add OS Entry tab.

Both OS's will now be independent to come and go as you please.

thank you mate