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Screwed Up Dual Boot Installation

post #1 of 23
Thread Starter 
I've got a 500GB WD green in as my main boot drive/windows 7 drive. I have another 2TB Seagate drive that I use for Fraps/backups/other things. The 500GB has no partitions but the 2TB has 2 partitions (1.6TB for Fraps, 150GB for backup). I found an old XP DVD and I thought to myself to make a dual boot of 7 and XP. So my plan was this: make another 100GB partition on my 2TB drive and then W7 will be in the same drive. Now, I didn't prepare and didn't know how exactly dual boot installations go (stupid me). I put the xp DVD in and told it to install into the 100GB partition. Ater installing, I wanted to go back to W7 to get my drivers for XP. I put the BIOS boot options to boot from the WD drive, but instead of going W7, it just went the XP hard drive? Now I checked my boot settings and first boot was on WD drive, but it seems that the computer wants to boot from the XP drive. I popped in my W7 DVD and told it to FORMAT the 100GB XP partition. I did that, checked my boot settings were on the WD drive first. Now when it boots, it says windows and some hard drive hardware change. I have removed the power plug from my 100GB partition hard drive (the 2TB Seagate), but same thing occurs. I don't know what to do now frown.gif it won't go to W7 and loading defaults in BIOS doesn't do anything. How do I get back into W7 as boot?

Ya I, I'm pretty stupid and didn't do any research on dual boots :/
Edited by Osea23 - 2/28/12 at 3:33pm
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post #2 of 23
It's been too long for me to walk you through it. But I can point you in the right direction. I might have missed something important in that wall of text though... use paragraphs.


When you installed XP it overwrote your bootmgr file. This file tells the bios which operating systems are available on the system.

When you removed XP the bootmgr file wasn't changed. So it's still telling the bios to boot XP, but it's not there anymore. It does not even know that your W7 installation exists.

You will either need to reinstall W7 to get W7 back on it, or you will need to edit the bootmgr file.

In my experience this is done easier using a program AFTER you boot into windows on your freshly installed OS (XP in your case). Since you are unable to boot into windows it's going to require a lot more work. Since you are inexperienced in these issues I highly recommend doing a reinstall of W7 and saving yourself some headaches.


Consider a lesson learned. Next time you attempt to try this you will know what to do before you do it. wink.gif


Edit: If you can plug your drive into another computer to edit the bootmgr that could also be an option.

Edit Edit: Or reinstall your XP like you did and boot into XP and fix it... like I said it's been too long and I wouldn't have gotten myself into this mess in the first place. smile.gif
Edited by Phantom_Dave - 2/28/12 at 4:43pm
post #3 of 23
Thread Starter 
So the cure is to just reformat and reinstall? Lesson learned, do more research on something before doing it. Dang it though, had lots of stuff, but that's why I put backup biggrin.gif and i need to reinstall all my games, fortunately steam will save me.

Well I formatted the 250gb xp drive and installed windows 7 on the same partition. i managed to get into my WD drive. Computer gave me choice to either boot W7 or W7 and I can now use W7 regular, but i still suppose i need to reinstall? right now i'll try to back more things up and do my homework and re install windows. thanks for the help.
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post #4 of 23
If you can boot into W7 then you don't need to reinstall W7 necessarily.

Look into what freeware programs can edit the bootmgr and take a look in there. I forget the name of the one I liked...

Once you get that far you will also have a pretty good idea of what you need to do to accomplish what it is you want to do. It's really not hard once you have the knowledge. You basically would install XP then use the program to add W7 back into the file (since installing XP will overwrite it). Then you will have the dual-boot option on startup.
post #5 of 23
Thread Starter 
From what i'm thinking. I have a temporary fix to this problem.

http://neosmart.net/EasyBCD/ <--- this seem legit? is it even bootmgr program?.
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post #6 of 23
Quote:
Originally Posted by Osea23 View Post

From what i'm thinking. I have a temporary fix to this problem.
http://neosmart.net/EasyBCD/ <--- this seem legit? is it even bootmgr program?.

Yes. That will do what you want. I believe it actually replaces your bootmgr file and uses it's own program. I could be wrong though. But it will work for what you want.

There are free ways to do this though, if you invest some time looking. But you can just buy that if you want to.
post #7 of 23
Thread Starter 
It's got a free limited edition us smile.gif thanks i'll test to see if this works when i'm done doing homework.

Rep to you wink.gif
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post #8 of 23
i have xp installed on a seperate disk whats no longer in my system but if my win 7 ever kicks a fit i can simply grab it from the caddy and boot to xp to get what i need to fix win 7 as i upgraded from vista and only have the vista disk i used the digital upgrade for win 7....

but rule of thumb when duel booting is to install old first then new after win7 will write the boot manager file when you boot the system it will ask which to boot too or in mycase i have to press enter for win7 down then enter for xp which is called "windows old"
post #9 of 23
post #10 of 23
Thread Starter 
Well my backup saved my butt smile.gif I KNEW IT WAS WORTH IT! So i popped in my W7 CD, told it to repair computer, and wadya know? It restored it to a system image i created earlier smile.gif Now to get my XP installed. Thanks for your hard work smile.gif
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ASUS VS248H-P Cooler Master Quickfire Rapid MX Blue Corsair AX650 Fractal Design Define R4 
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