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Windows 7: Messed up the Registry! No Program can start, not even regedit

26 Apr 2015   #1
earthqkz

Win 7 Ultimate 64 bit
 
 
Messed up the Registry! No Program can start, not even regedit

Hi,
today i wanted to change the default program files direction to "Q:\Program Files\" instead of "C:\Program Files". So what i did was:
-I opened regedit
-HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\
-and i just changed "C:" in every value that contains it, to "Q:"

Now, after i rebooted my pc for the first time since that, i cant open any programs with their executables located on "C:". Neither can i move anything to or from "C:". Not even Windows programs like "regedit" work.
It keeps saying "C:\Program Files\Teamspeak 3 Client\teamspeak.exe" cannot be found! Please make sure if you spelled it right!" (Sorry if the translation sucks, i'm german ^^).

And i also got an error like "class not found" or something.. please help me!


My System SpecsSystem Spec
.
26 Apr 2015   #2
paul1149

Linux Lite 2.8 x64 (full-featured, fast, rock-solid)
 
 

Just as Windows begins to boot, press F8 for Advanced Boot Options. Try Last Good Configuration. Next try Restore System to previous point in time.
My System SpecsSystem Spec
26 Apr 2015   #3
earthqkz

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by paul1149 View Post
Just as Windows begins to boot, press F8 for Advanced Boot Options. Try Last Good Configuration. Next try Restore System to previous point in time.
Thats exactly the problem.. I cant even do that.. when i try to open it, it says "System Recovery could not be started". I need to somehow put it back to default.. still i have no idea how
My System SpecsSystem Spec
.

26 Apr 2015   #4
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

What is your reasoning for doing this?

Quote:
today i wanted to change the default program files direction to "Q:\Program Files\" instead of "C:\Program Files"
My System SpecsSystem Spec
26 Apr 2015   #5
paul1149

Linux Lite 2.8 x64 (full-featured, fast, rock-solid)
 
 

Last Good Config also didn't work?
My System SpecsSystem Spec
26 Apr 2015   #6
earthqkz

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by paul1149 View Post
Last Good Config also didn't work?
nope..
My System SpecsSystem Spec
26 Apr 2015   #7
carwiz

Windows 7 Pro-x64
 
 

Boot from your Windows disc and do a repair install.
My System SpecsSystem Spec
26 Apr 2015   #8
earthqkz

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by carwiz View Post
Boot from your Windows disc and do a repair install.
What do you mean?
My System SpecsSystem Spec
26 Apr 2015   #9
paul1149

Linux Lite 2.8 x64 (full-featured, fast, rock-solid)
 
 

I would go in with a boot disk - linux (Mint or an older Parted Magic) would be easier than WinRE - and go to ..\windows\system32\config and rename System to system.old. Then go to the RegBack folder there and copy System to the mother folder.

(That is, providing that Regback\System has a Modified Date predating the problem.)
My System SpecsSystem Spec
26 Apr 2015   #10
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Here you go a tutorial by Brink.

Repair Install
My System SpecsSystem Spec
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 Messed up the Registry! No Program can start, not even regedit




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