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Windows 7: Can't boot after running CCleaner

24 Aug 2014   #11


System Recovery Options can be accessed from Win7 installation media or Repair CD - System Repair Disk.

Installation media for your licensed version and tool to burn to DVD or stick is in Troubleshooting Windows 7 Failure to Boot

My System SpecsSystem Spec
24 Aug 2014   #12

Windows 10 Pro

This is the first time I have seen someone run ccleaner reg cleaner and had something major like this happen. As A general rule, never run registry cleaners unless you are 100% sure what keys it is deleting.

Registry cleaners are not really needed anyway. Windows can take of itself. Some good suggestions have already been offered, and I am sure after this experience you will not touch the registry cleaner again. The cleaner is good and fine, but I would stay away from the reg cleaner, especially novice users.

See my tutorial for the future:

CCleaner - Delete Junk Files
My System SpecsSystem Spec
26 Aug 2014   #13

Windows 7 64-bit Home Premium

Thanks for the responses. I was on travel for a couple days, but now back at it. I've attempted to run Startup Repair a couple times consecutively. The first time it says Windows cannot repair this computer automatically. Everytime I run it after that it says Startup Repair could not detect a problem. Restarting still results in a BSOD though.

Ztruker, I followed what you said but after entering ren system system.sav it returns The system cannot find the file specified.
My System SpecsSystem Spec

26 Aug 2014   #14

Windows 10 Pro X64

After you enter

cd c:\windows\system32\config

Do a dir

See if


are there.

Also do a dir regback\ to see what is in that folder. Should be all of the above.

If SYSTEM is missing, go ahead and do the copy regback\system system, see if that works.
My System SpecsSystem Spec
27 Aug 2014   #15

Windows 7 64-bit Home Premium

Ztrucker, I messed up following your first instructions before. I got to the right drive and followed those instructions and Windows still crashed.

I do see those folders in dir and when I run dir regback\ I see DEFAULT, SAM, SECURITY, SOFTWARE, SYSTEM
My System SpecsSystem Spec
27 Aug 2014   #16

Windows 10 Pro X64

Repeat but this time copy


see what that does for you. If still no help, copy SAM.

If still no joy then definitely follow gregrocker's adivce:
My System SpecsSystem Spec
28 Aug 2014   #17

Windows 7 Ultimate 64-bit

This is the first time i have heard of CClearner making a mess like this!

Next time i will think twice about using it.
My System SpecsSystem Spec
28 Aug 2014   #18


Please keep in mind this is only hearsay.

We've never had a documented case here of CCleaner being responsible for failure and some of us have learned the hard way that blaming it is only speculation: CCleaner Fail?
My System SpecsSystem Spec
28 Aug 2014   #19

Windows 7 64-bit Home Premium

So I copied SECURITY and SAM and still BSOD. Tried System repair another 15 or so times, still BSOD. Was trying to hit F8 on boot to get to advanced boot menu again and the thing loads to the login screen... I have no idea what actually worked to get here because nothing ever said 'hey you're fixed now'. I have the Admin account enable. What is the first thing I should do to stabilize it? Merge that registry backup?
My System SpecsSystem Spec
28 Aug 2014   #20


How many of the dozen steps I gave you have you completed?

Which bootable AV was run to check for infection?

Which is the Active partition which also determines whether repair will even work?

Post back a picture of PW disk drive map with listings.

Don't blame CCleaner when you haven't performed a single one of the Troubleshooting steps given.
My System SpecsSystem Spec

 Can't boot after running CCleaner

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