Regedit disabled by administrator

If not set by policy, then it is usually a sign of some type of malware. Try downloading and running this vbs script. It toggles the state of regedit. If it is disabled, it will be enabled. Enabling requires a restart, so reboot to test.

http://www.dougknox.com/security/scripts/regtools.vbs

If that does not work, then try this sequence:

Click Start -> Run. Type this command in Run box and press Ok.  (You can copy and paste)

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0

Then a prompt will come up with this question: Value DisableRegistryTools exists, overwrite (Y/N)? Type yes and hit Enter.

After u did that also type this command in the run box and hit enter.

REG add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0

Then it will also come up with the question: Value DisableRegistryTools exists, overwrite (Y/N)? Type yes and hit Enter.

This article ahs several different methods of fixing the issue.  I typically use Method 4.
http://www.pchell.com/support/registryeditordisabled.shtml

run regedit in safe mode and make the alter as above. The problem came due to virus affected check with sdat .exe. once virus is remove then do the regedit work.

If u do regedit before virus remvel no effect with be there.

i did all the methods but no luck.
I believe its due to some virus, we are using Symantec EndPoint Protection but that does'nt work for this virus.
Can anyone provide me any other free tools/exe thru which i can scan and remove this virus/malware.

Try this:

http://www.dougknox.com/xp/utils/xp_emergencyutil.zip

Look here for instructions:
http://www.dougknox.com/xp/utils/xp_emerutils.htm

Basically, it creates new versions of regedit, taskmanager, and msconfig. Try using the new regedit as instructed. If it works and you get in there, chances are that the following key is remapping all that great stuff to svchost so it looks like nothing is happening. Look here in the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options

Within that key, I bet you find a ton of entries, each of them remapping a "good" program to a bad. This stops the program you want from executing. As a start, scroll down the list and look for regedit. If you find it, highlight it and delete. You can actually delete every entry in that key.

The ones usually recommended here are

Malwarebytes
Combofix
HitmanPro
TDSSKiller

Those usually cover a wide range.

Rename c:\windows\regedit.exe to c:\windows\blah.com

Does it work?

If so, look at the following....

start>run>cmd

Paste the lower commands...

Do they return results? Most likely the keys can be deleted.....

second set deletes them if present.....

reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\regedit.exe"
reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe"

reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\regedit.exe" /f
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe /f

Select allOpen in new window

Others to try if needed
ExeHelper
http://raktor.net/exeHelper/exeHelper.com

FixPolicies
http://downloads.malwareremoval.com/BillCastner/FixPolicies.exe

Likely due to malware/viruses present in the system, so when you fix the symptom while the nasties are still there it won't work as it will be disabled almost immediately.
Use the already suggested tools to fix the symptom and then scan the system to remove the culprit.

As suggested, scanners you can use to scan the system:

MalwareBytes:
http://www.malwarebytes.org/mbam-download.php

HitmanPro:
http://www.surfright.nl/en/hitmanpro

TDSSKiller:
http://support.kaspersky.com/downloads/utils/tdsskiller.zip

ComboFix:
http://www.bleepingcomputer.com/combofix/how-to-use-combofix

did you use win32 sality killer kaspersky tool
if sality virus exists there is no any effect what ever you did
so first verify whether pc is sality free

Odd, we should have had that resolved with teh methods in the thread....

Anyhoo, glad youre fixed.....

I had follow all suggestions/troubleshooting steps given by expers but nothing worked for me. Then i got RRT from one of my vendor and it resolved my issue.
I ran it on all 7 systems and all these systems are working fine now.