Fixed Regedit cannot open

This problem cause by third party program that runs in your pc without knowing where and when this started , you will noticed your computer suddenly slowing but you are thinking that because it is old or over use. But actually some viruses did this to your machine you actually killed the virus but the virus had done already secretly managing some editing with your registry.   CAUSES Corrupt registry settings or some third party product (or virus) can change the default configuration for running EXE files. This may lead to failed operation when you try to run EXE files.

SOLUTION:

1. Click Start, and then click Run.


2. Type "command.com" , and then press Enter. (A DOS window opens.)


3. Type the following:

"cd\"

"cd \windows"

Press Enter after typing each one.

4. Type copy "regedit.exe regedit.com" and then press Enter.

5. Type "start regedit.com" and then press Enter.

6. Navigate to and select the key:

HKEY_CLASSES_ROOT\exefile\shell\open\command

7. In the right pane, double-click the (Default) value.

8. Delete the current value data, and then type:

                           "%1" %*

Tip: Type the characters: quote-percent-one-quote-space-percent-asterisk.

Navigate :

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Image File Execution Options\regedit.exe
in the right panel, right click of the mouse on the value "Debugger" and delete ! (Date of Value are C:\windows\notepad.exe)
one more in to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Image File Execution Options\msconfig.exe
in the right panel, right click of the mouse on the value "Debugger" and delete ! (Date of Value are C:\windows\notepad.exe)
Now close regedit
and try open "regedit" from RUN window
or direclty in to the your system folder c:\windows\regedit.exe

ok after this tip, if you cant open regedit because you read the  windows xp message:
Regedit.exe has been disable from system administrator
you can try whit this tip for fix disable rules:
1) Go to start > settings > control panel > folder option (open this icon)
2) Go to View window
3) You need to enable "Show hidden files and folders"
4) You need to disable "Hide extensions for known file types"
5) Click on "Apply" and "OK" button too.
Now you can read all real extensions and hide files and folders in your computer
6) Go to your desktop
7) Right click mouse on desktop > new > text document
Call text document "unhook.txt"
8) Now open "unhook.txt" and paste this inside "unhook.txt":
[Version]
Signature="$Chicago$"
Provider=Symantec

[DefaultInstall]
AddReg=UnhookRegKey

[UnhookRegKey]
HKLM, Software\CLASSES\batfile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\comfile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\exefile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\piffile\shell\open\command,,,"""%1"" %*"
HKLM, Software\CLASSES\regfile\shell\open\command,,,"regedit.exe ""%1"""
HKLM, Software\CLASSES\scrfile\shell\open\command,,,"""%1"" %*"
HKCU, Software\Microsoft\Windows\CurrentVersion\Policies\System,DisableRegistryTools,0x00000020,0


pause

9) Now save this modify
10) Now right click on "unhook.txt" and rename the extensions file "unhook.inf"
11) Windows ask if you want modify the file extensions, click yes
12) Now right click on "unhook.inf" and click on "Install"
13) Now go to start > run > type "cmd" or "command" if you have a old windows before windows XP version.
14) Now type "cd \"
15) Now type "c:\windows\copy regedit.exe regedit.com"
"When you read the message, 1 file has correctly been copied,
16) Now type "c:\windows\start regedit.com"
And now you can open regedit and you can to delete all debuggers value (C:\windows\notepad.exe) under the right panel from the applications you find under this reg key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Image File Execution Options\
Example: "regedit.exe" "msconfig.exe"
and all system admin applications they have inside in the right panel the value "Debugger" whit "c:\windows\notepad.exe"
May be i think the many problems are fixed, but for your security, download the Trend Micro Internet Security Trial 30 day version (xp32or64 - Vista32or64)
from this web page http://uk.trendmicro.com/uk/downloads/home-and-homeoffice/
(When you install Trend Micro Internet Security he unistall before all yours Antivirus Software)
After the installation update immediatly the antivirus definitons and try to scan all your hard disk and external hard disk too if you have.


9. Close Regedit utility.

Note: If you are using Windows XP and you enable "System Restore" , you need to

disable "System Restore" in "Safe Mode" before using the instructions above.