No Access to HKEY_CLASSES_ROOT!

August 27, 2006 at 10:54:59
Specs: Windows XP SP2, 1024 MB/3.4 GHZ

Yesterday, for some reason, I didn't have access to some registry keys in the HKEY_CLASSES_ROOT key even though I have administrator privileges and I'm the only user. I didn't want to manually search for the keys to change permissions on so I checked the permissions for HKEY_CLASSES_ROOT. It said that I had full control but I was sure that that wasn't true. I ended up doing something really stupid by trying to uncheck full control and then rechecking it. After I unchecked full control, I couldn't change the permissions anymore and Windows wouldn't work. What should I do to gain those permissions again?

See More: No Access to HKEY_CLASSES_ROOT!

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#1
August 27, 2006 at 11:01:36

System restore.

http://computervitals.com/


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#2
August 27, 2006 at 11:20:06

I can't even boot Windows because the registry can't be read. HKEY_CLASSES_ROOT contains the file extensions to open an executable file so system restore wouldn't work even if I could boot Windows successfully.

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#3
August 27, 2006 at 11:35:24

http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B307545

i_XpUser


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Related Solutions

#4
August 27, 2006 at 11:38:38

How to do a system repair.--Boot from the xp cd and go past the recovery console to the install menu. Select repair the existing installation. You won't lose any data except the xp updates. Unless you have a slipstream sp1 Or SP2 cd you will have to d/l sp1 or sp2 and all subsequent updates. You MUST have at least SP1 installed and the updates for security reasons. Be sure the firewall and A/V is active before going online as you will be susceptible to sasser and msblaster.

http://computervitals.com/


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#5
August 27, 2006 at 12:39:13

Thanks XpUser, I'll try that when I get home. per, I already tried that but it doesn't work.

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#6
August 27, 2006 at 12:41:20

Also, will I still have my registry settings?

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#7
August 27, 2006 at 12:49:44

I cannot guarantee anything for the mere fact that (1) I have never tried it, and (2)the procedures outlined in the reference MSKB is rather complex. Anything can go wrong in the process.

The alternative would be to perform repair reinstal using native XP CD. If yours is a Dell this option may not be available to you with Dell Recovery CD.

i_XpUser


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#8
August 27, 2006 at 12:50:56

Can I modify the procedure to just change the HKEY_CLASSES_ROOT's permissions? That's the only part of the registry that's stopping Windows from loading.

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#9
August 27, 2006 at 13:03:15

If the PC is my own PC I would swallow the bitter pill and then pop in Dell Restore CD.

i_XpUser


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#10
August 27, 2006 at 13:04:18

Try this to access system restore.

When starting the computer, just keep pressing the F8 key after the memory count to bring the boot menu shown above up. Select the Safe Mode with Command Prompt option . Enter cd \windows at the C:\> command prompt. The prompt changes to C:\>\Windows. Then just enter system32\restore\rstrui.exe and you should have access to System Restore. RSTRUI.EXE is System Restore's program file.

http://computervitals.com/


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#11
August 27, 2006 at 13:43:33

I don't think I can do that because my system restore is limited to certain commands.

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#12
August 27, 2006 at 14:44:15

AAAAAAAHHHHH!!!!! I think I've tried to many things to fix my computer and now my computer has been restored to something like a year ago. How can I get my desktop icons back? For some reason, there's no system restore points other than the one I created today.

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#13
August 27, 2006 at 15:02:08

..and now my computer has been restored to something like a year ago.

I don't know what you did but System Restore repository is 90 days backward, not a year.

i_XpUser


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#14
August 27, 2006 at 15:07:14

With no other restore points what you see is what you get.

http://computervitals.com/


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#15
August 27, 2006 at 15:31:50

Wow, I'm really screwed. At least PC Inspector File Recovery recovered most of my files but not my registry. Take a look at what Registry Mechanic found. http://www.geocities.com/superthingz/registry_mechanic.JPG

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#16
August 27, 2006 at 15:33:35

Run CHKDSK /R from the recovery console.

http://computervitals.com/


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#17
August 27, 2006 at 15:39:33

Do you think that I can restore my registry by using PC Inspector File Recovery to recover the files that make up the registry and using the recovery console to overwrite the new ones?

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#18
August 27, 2006 at 15:44:15

Nope. Windows won't allow an overwrite of the registry.

http://computervitals.com/


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#19
August 27, 2006 at 15:51:31

Even with the recovery console?

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#20
August 27, 2006 at 15:53:55

Asked and answered.:>)

http://computervitals.com/


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#21
August 27, 2006 at 15:57:29

If anyone can just tell me which file in "C:\WINDOWS\SYSTEM32\CONFIG" controls the permissions of the registry, I can modify the instructions in tp://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B307545 so that I can restore the other files that were backed up and just reset the file that sets registry permissions.

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