Hi everyone,
I had Deepin 15.3 install on my desktop pc, but didn't like it. I removed it, formatted my drive and installed Win7. Ever since, I've been getting Grub Rescue message or Bootmanager is missing errors. I'm usually able to boot into Windows with either the rescue disk or now I also have Grub 2 on a USB stick.

What I would like to do is totally remove any traces of Grub/Linux and rebuild my Win7 MBR/Bootmgr. I have been through the command prompt routines in Windows, but even that does no longer work. I was able to boot window off the Grub2 USB this time, but I really need to get this repaired permanently.

I was actually working fine for awhile, but today when I swapped out a couple drives, the Grub Rescue message showed up again.

Any help will be appreciated, as I have googled this problem to death and I'm definitely missing something.

Core i5-2500K CPU @ 3.30Ghz
8GB Ram

Boot the Windows 7 dvd.
Command prompt.
bootrec /fixboot
bootrec /rebuildbcd

Then start diskpart
select disk <number> primary, where Win is installed.
list partition
select partition <number>
active

1 members found this post helpful.

Thanks for your reply. I appreciate it. I've been all through the diskpart stuff and the rebuilding the MBR etc. It only gets worse and I'm still having a grub rescue issue from time to time. Worse part is there is only one partition to deal with so, I don't know how to delete grub or how to reinstate my MBR. ;I think I've screwed it up so bad now, that I will have to format and reinstall the OS. However, it still remains, HOW TO MAKE SURE THAT GRUB DOESN'T REAR IT'S UGLY HEAD AGAIN. Last time I did a COMPLETE/LONG VERSION format of the drive before installing WIN7 and Grub still shows up. Is it hiding in the BIOS? or what? I don't have a Linux partition and did a full format, so, don't understand why it's still shows. Like to know before I do this again. Any ideas?

How did you 'remove' Deepin? Simply deleting the partition it was on or formatting it won't get rid of Grub as Grub has code in the MBR.
The grub rescue error would be the result of having Grub code in the MBR and not finding the rest of the Grub files on the Linux partition, in your case because you deleted the partition. The bootmgr error is a windows error as that is a specific boot file for windows systems.

The commands suggested above usually will overwrite and put windows code in the MBR, not sure why it didn't work in your case.

You might try getting the boot repair software and burning it to a CD/flash drive and booting it. You can select the option to Create BootInfo Summary and review that or post a link to the output here. That should give enough informatin for someone to make a suggestion.

https://help.ubuntu.com/community/Boot-Repair

Grub is not 'hiding' in the BIOS. Generally with an MBR install there is Grub code in the MBR and on the Linux partition. With an EFI install, there is Grub code on the EFI partition and the Linux partition.

@ OP there is also a Fix MBR command you can iusse in that repair mode Windows puts you in.

How many disk(s) do you have?
Did you check the boot order?

As far as I know, MS Windows is the best in the business getting rid off other OS's. They have never failed me to hose the MBR written by other. So if you have already reinstalled Windows, I was wondering why there is still traces of Grub lingering there?

Here's something. (EverydayLinuxUser.com looks very interesting!)

Sorry to hear Linux didn't 'work out' for you. Best wishes!
p.s. VirtualBox (&osboxes.org) allows simple&quick 'zero'-Windows-impact experimenting!