Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Reinstalling Windows7 on pc which isn't booting with Bitlocked drives

21 Jul 2013   #1
Sakar Thapa

Windows 7 Ultimate x86
Reinstalling Windows7 on pc which isn't booting with Bitlocked drives

My laptop suddenly crashed yesterday and when I restarted it, it says "windows failed to load because the system registry file is missing or corrupt" error 0xc000009 . I tried to do System Repair using Windows 7 CD but since 2 of my drives (not the C system drive but E & F drives that I had previously partitioned), it asked me for the bitlocker key. Unfortunately, I lost the flash drive I had my keys saved on. So I was thinking of fully re-uninstalling Windows if that is possible. But I want to make sure that the 2 drives E & F will be normally usable by unlocking those drives using the password since I have 2 years of my works there and I have no back up of those files. So, if I re-installed Windows, do I have to take the risk of having to format those 2 drives afterwards? I don't even know how I got this error in the first place. I hadn't messed with any files on the C drive at all.
Nervously waiting for help.

My System SpecsSystem Spec
23 Jul 2013   #2
Microsoft MVP


I know of no way to recover your files if you lose your Bitlocker key.

To try on the OS HD Troubleshooting Windows 7 Failure to Start or to do a Clean Reinstall you should unplug all other HD's anyway, so whether you later format them is a separate issue.

The lesson here is obviously to have a backup of both your files and your encryption key. BitLocker Drive Encryption - Unlock a Locked OS Drive
My System SpecsSystem Spec
23 Jul 2013   #3

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1

Quote   Quote: Originally Posted by Sakar Thapa View Post
"windows failed to load because the system registry file is missing or corrupt" error 0xc000009 .
Try System Restore so go back in time.
Also possible by tapping F8 at boot=>repair your computer. Advanced Boot Options
My System SpecsSystem Spec

24 Jul 2013   #4
Sakar Thapa

Windows 7 Ultimate x86

Thankful for the help. I don't exactly know what I did but I'm fine for now. Do you guys know how I can regenerate the bitlocker key files?
My System SpecsSystem Spec

 Reinstalling Windows7 on pc which isn't booting with Bitlocked drives

Thread Tools

Similar help and support threads
Thread Forum
After reinstalling Win 7, problems with booting, restores on startup
Win 7 Ultimate, Dell n7110 Lately Win became very laggy anpd unresponsive so I reinstalled Windows. It worked fine until few days when the same issues started + problems with booting (very slow, had to use Repair etc). I reinstalled again. I had only few programs on it, just started to fill it...
Performance & Maintenance
Booting taking considerably longer after reinstalling Windows 7 on SSD
After doing a complete reinstall of Windows 7 on my Crucial M4 SSD, I'm noticing it takes considerably longer to boot into Windows than it used to on my previous install. I suspect there could be a lot of potential causes for this, but I'm not sure where to even start. Any suggestions?
General Discussion
Cannot see network after reinstalling windows7
My laptop windows 7 64 bit was working, but getting sluggish. There was too much on it, like eg VM ware player. Si I re-installed from scratch windows 7. Now it cannot see the wireless network:" No connections are available." Thanks in advance Gerhard
Network & Sharing
windows 7 booting & reinstalling problem, bootmanager related
recently, i have been using my windows 7 for months but yesterday only,it crashed and when i am restarting the pc, its now even showing the repairing options upon inserting the windows 7 installation disc. i have my computer practicals in this week, and my pc has crashed and its not booting up....
Installation & Setup
Booting Windows7 on FAT32
First question - Is it possible at all? Second - I am trying to achieve this. All I did was created a booted my system with 1st HDD that had Win7. I have additional 2 HDDs. One has stripped down version of Win7 created using vLite. 3rd HDD has a FAT 32 partition. I copied all the files...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 09:13.
Twitter Facebook Google+