BSOD 0x00000007E file wdfldr.sys

Hi. I've got a really weird problem. I had Windows 7 on partition C: and Windows XP on D:. I was using 7 about 2 years without any errors before. Yesterday on windows starting i got BSOD with "wdfldr.sys" file.

Firstly i choosed option "load last good setting" (or sth like this, sry my english isn't so well) = no effect. All options there including Safe Mode didn't work. Later "repair startup" option 2 times =no effect, "chkdsk" = no effect. Today next turn, but i was (and still i am) little confused, cause i had a message "error with loading system" or "can't load..." sth like this. Hmm strange because:
a) i couldn't even choose which OS i want to load in;
b) i tried fast reinstall win xp but no difference(i mean after copying install files from cd sys didn't boot);
c) i read in the web that this error could be dissolved by changis some options in bios, clearing CMOS etc, done that all and no difference still;
d) some tries with windows 7 startup repair tool and using command prompt but of course no effect :)
e) i decided to install second Windows 7 to try fix first one, i installed it well on D:
And what i have there now... I see two OS's on boot screen, that's Windows 7 and Windows 7 , new is booting fine, older the same BSOD as earlier. Now i have changed names and letters of partitions but it's not important, I tried to replace new, "clean" wdfldr.sys to older windows folder but i can't because of permissions to change there anything. As you can see this is very, very important for me to load in normally my old system, i've tried anything perhaps. I am just frustrated really... I'll be very, very glad for any kind of help. Regards, Paul.

Unfortunately with the newly installed Windows, this is going to be a mess to fix. I assume when you try to boot the old Windows, you still get the blue screen crash? To copy the wdfldr.sys over, you need to change permissions/ownership on the file in the old installation. For information on how to do so, see Extract Files from Windows 7 Installation DVD and Take Ownership

Hi. I'll read all infos which you send, but one fast question yet:
Can i change ownership settings of one system being on second? As in my case.

Hah btw. if even if I'll succesfully replace original, clean files for virused this not so sure that system will get up I feel totally ruined but i wish myself everything will end well. Thx, greetings.

maksikk37 said:

Hi. I'll read all infos which you send, but one fast question yet:
Can i change ownership settings of one system being on second? As in my case.

Hah btw. if even if I'll succesfully replace original, clean files for virused this not so sure that system will get up I feel totally ruined but i wish myself everything will end well. Thx, greetings.

It's possible you won't be able to recover it, but proceed one step at a time and we may be able to salvage your problems. :) And yes, you should be able to take ownership of the files on the broken system from the working system.

Hi. So i tried to copy (succesfully of course) original files from Windows DVD to my two folders, where this file was before:
D:\Windows\winsxs\amd64_microsoft-windows-wdf-kernellibrary_31bf3856ad364e35_6.1.7600.16385_none_d24809e1379d1f91
and
D:\Windows\System32\drivers

but no effect still. Maybe other ideas to resolve this problem? Thx for helping.

Can you post your Minidump from the old Windows system? It would be inside *:\Windows\Minidump where * is the drive letter of the old Windows installation. Just copy the Minidump folder to your documents on the working Windows system and zip the folder to upload on here. I'll take a look at the most recent crashes and see if I can determine an underlying cause.

Hi.Unfortunatelly folder 'Minidump' is totally empty:/
Any other ideas?

On the bad Windows, use Advanced Boot Options to get to System Recovery Options and proceed through the steps in Startup Repair Infinite Loop Recovery to see if you can start Windows that way. Since you have two installations, make sure you run through the steps on the correct drive by checking the file and folder layout for your old files before proceeding.

writhziden said:

On the bad Windows, use Advanced Boot Options to get to System Recovery Options and proceed through the steps in Startup Repair Infinite Loop Recovery to see if you can start Windows that way. Since you have two installations, make sure you run through the steps on the correct drive by checking the file and folder layout for your old files before proceeding.

Man You Are Awesome, thank you a lot! System should works fine now, really i am glad for help all of you people. I love you

Btw. maybe someone have good idea for easy and secure uninstall 'new' windows, which now is unusable?

maksikk37 said:

writhziden said:

On the bad Windows, use Advanced Boot Options to get to System Recovery Options and proceed through the steps in Startup Repair Infinite Loop Recovery to see if you can start Windows that way. Since you have two installations, make sure you run through the steps on the correct drive by checking the file and folder layout for your old files before proceeding.

Man You Are Awesome, thank you a lot! System should works fine now, really i am glad for help all of you people. I love you

Btw. maybe someone have good idea for easy and secure uninstall 'new' windows, which now is unusable?

Just delete the partition through Disk Management [Start Menu -> Right click My Computer/Computer -> Manage -> Follow UAC Prompt -> Disk Management (from the list on the left) -> Right click partition to delete -> Delete volume...] and then extend the partition you are using for Windows by right clicking the partition in Disk Management and clicking Extend volume...