Windows 7 Reboot loop - Safe mode doesn't work

Anonymous
2009-12-02T16:58:19+00:00

We are having some major problems with several of our computers.

Two different models running Windows 7: HP dc5100 and HP dx2250

They turn on, reach the "Starting Windows" splash screen, go blank and immediately restart in an endless loop.

I have tried Safe Mode with no luck. It stops at "CLASSPNP.SYS" and then restarts once again into the endless loop.

I have also tried a startup repair with the Windows 7 DVD. It is unable to do a startup repair and comes up with this error message:

Problem Event Name: StartupRepairOffline

Problem Signature 01: 6.1.7600.16385

Problem Signature 02: 6.1.7600.16385

Problem Signature 03: Unknown

Problem Signature 04: 21201148

Problem Signature 05: External Media

Problem Signature 06: 5

Problem Signature 07: 0x6b

OS Version: 6.1.7600.2.0.0.256.1

Locale: 1033

I have also seen a BSOD come up at random times right after the Windows splash screen that says "PROCESS1_INITIALIZATION_FAILED 0x0000006B (0x0, 0x0, 0x0, 0x0)." That's if i can read it fast enough before it reboots!

If ANYONE has some suggestions, please let me know! We have several computers at various locations all having the same problem! The last thing I want to do is reload all of these computers after meticulously backing up files from the hard drives!

ALSO: All of these were done with a clean install. No upgrades. Windows 7 was installed on here over a month ago with no problems until today. No additional hardware installed.

-Benjamin Dudley

Windows for home | Previous Windows versions | Windows update

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments
Answer accepted by question author
Anonymous
2009-12-22T12:14:07+00:00

Hi.

This is a workaround that works for us:

  1. delete bootcat.cashe from C:\windows\system32\codeintegrity. on broken pc.

        the file is 384 bytes when broken , is 2,344,056 when OK. is beeing recreated when booting.

  1. copy from a ok pc c:\windows\system32\catroot{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\ to broken pc.
  2. restart.

I can`t say this is 100%, but for us with the same hardware it seems to work find.

We have not been able to find out the roor course.

/K

Was this answer helpful?

40+ people found this answer helpful.
0 comments
Answer accepted by question author
Anonymous
2010-07-01T15:36:56+00:00

Hi, We have15 Lenovo x201s that have the issue and the fix works. I have documented it, you can pretty it up if you would like.

We also Have SEP ver 11.0...

Tim

Boot machine and once you see the  logo press F12 to enter the boot menu.

Within boot menu toggle down to USB(setup with Win7 media set to bootable) and or location of Windows 7 media DVD

Install windows window opens accept defaults and press Next

In this window on the lower left side click Repair your computer

System Recovery options window opens and a 2<sup>nd</sup> window that is searching for problem

Once the search finishes you have an option of Repair and restart or No Click No

In System Recovery Options Window click Next

2 Startup Repair Windows opens in 2<sup>nd</sup> Startup Repair Window click cancel

Attempting Repairs runs When Complete click cancel a System Recovery Options window opens

Click on Command Prompt

You will see X:\Sources>

Type C: and click enter

Type cd \Windows\system32\CodeIntegrity then click Enter

Type Del boot bootcat.cache then click Enter

Type CD \ and click Enter

You should now be at C:

Type Exit then click Enter

Click restart

Logon to Windows as administrator

Copy the file from a known good machine c:\windows\system32\catroot{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\ to broken pc and replace

Reboot

Was this answer helpful?

20+ people found this answer helpful.
0 comments

55 additional answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2012-03-28T16:25:13+00:00

    For me, it appears to be something in the "{F750E6C3-38EE-11D1-85E5-00C04FC295EE}" folder.

    After looking at another WIN 7 PC, my folder had 1c ,1d (and so on) files in there. I deleted them so I only had the standard files in the folder and it worked!!

    Spent 3 days solid trying to fix this.  So glad it appears to be working now.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2011-10-07T21:14:33+00:00

    Hello,

    I had the same problem, the system would reboot the instant the windows logo would start to show... I will only see a little dot of the red and white portion of the windows logo then the machine would reboot.  Also, safe mode didn't work and all attempts to repair using windows startup fix didn't work either.  I have an HP Pavillion P6126f computer.  I am running Windows 7 Home Premium.

    Now to the solution... I did a completely new install of Windows 7 Home Premium using Microsoft media rather than the HP image.  The system came up after the install without problems.  As soon as I completed the first set of windows updates, the system reverted back to the same reboot loop.  After some troubleshooting, I realized that the NVIDIA nForce Serial ATA Controller driver being pushed out by Microsoft is not working on my machine.

    I reinstall Windows 7 clean and did all my updates without selecting the driver above without any problems.  The system is now running properly.

    Hope this helps.

    Sincerely,

    Was this answer helpful?

    0 comments
  3. Anonymous
    2011-09-23T07:18:50+00:00

    it doesn't work for me

    my computer in during install xp mode took this problem

    Was this answer helpful?

    0 comments