Boots To Black Screen And Reboots

[at1105]

Working on an eMachine laptop running Windows 7 Home Premium. On boot up it shows the Windows Logo for a couple of minutes and then goes to a black screen with mouse pointer and then suddenly reboots. Safe Mode does the same thing.

What i've tried:

Startup repair fails.
Last Known Good Configuration doesn't work.
System Restore Fails.
Manually restoring boot files with bootrec via the Windows 7 disc doesn't work.
I have tested and pulled both the memory and hdd - both good.
Slaved the hdd and ran virus scan - nothing found.
chkdsk repaired errors but still nothing.
sfc /scannow gives system repair pending error.

Any ideas?

 

[nlinecomputers]

It is probably a BSOD. Disable reboot on error and find out what it is.

 

[at1105]

Disabled Automatic Restart and it doesn't give a blue screen, just shuts down and reboots.

 

[nlinecomputers]

Might look at this.

http://www.tumblr.com/search/There+is+a+system+repair+pending+which+requires+reboot+to+complete.

 

[nlinecomputers]

And this:

http://superuser.com/questions/608371/how-do-i-recover-from-repair-pending-error-in-sfc

 

[at1105]

And this:

http://superuser.com/questions/608371/how-do-i-recover-from-repair-pending-error-in-sfc

The cleanup.xml file isn't present and the RebootPending registry entry is there either. Also tried the dism.exe command string but it didn't work.

Would reloading the registry hives possibly help or should I just look to reformat and reload Win?

 

[nlinecomputers]

I'm out of ideas. N&P or reload on top. Depends how much time you want to spend with it.

 

[at1105]

I copied all the backup registry hives from C:\Windows\System32\Config\Regback\ into the \Config\ folder and was able to overwrite the old ones. On restart it booted right up. As always, thanks for the help!

 

[johnrobert]

I did this yesterday when there was no restore points

I had same situation

 

[nlinecomputers]

Those are the generic first run registry files are they not? So all programs installed will have to be reinstalled etc? Might as well have nuked and paved. But you might be able to extract newer hives from System restore points. Even if the SR fails the hives may still be salvageable.

 

[MDD1963]

Think I would be looking at a few assorted rootkit scanners...

aswMBR - can find it at bleepingcomputer
MalwareBytes AntiRootkit - can find it at malwarebytes

(Sorry, I'm too 'new' yet to be allowed to post highly technical URLs!)

 

[MDD1963]

And, I'd also try an up-to-date Microsoft Defender offline iso, a bootable anti-rootkit/antivirus scanner....

a quick search at Microsoft/downloads will yield results...

 

[Romaniac]

If you're running out of options, try imaging the drive - verify image. This will also serve as a backup, if you haven't made one.

Re-install Windows. The 100MB OS/system reserved partition will be recreated.

Replace the OS partition with the image you made.

 

[HFultzjr]

Working on an eMachine laptop running Windows 7 Home Premium. On boot up it shows the Windows Logo for a couple of minutes and then goes to a black screen with mouse pointer and then suddenly reboots. Safe Mode does the same thing.

What i've tried:

Startup repair fails.
Last Known Good Configuration doesn't work.
System Restore Fails.
Manually restoring boot files with bootrec via the Windows 7 disc doesn't work.
I have tested and pulled both the memory and hdd - both good.
Slaved the hdd and ran virus scan - nothing found.
chkdsk repaired errors but still nothing.
sfc /scannow gives system repair pending error.

Any ideas?

Have you tried:
Different known good power supply?
Is CPU or other component overheating and causing shutdown?
Does it run a live CD with no issues?
Does it run with only the "bare" essentials connected?
Have you checked the motherboard for leaking/swollen capacitors?
Have you checked/replaced the ram?

I could go on and on, but,

Personally I would see if it runs a live cd to help determine software or hardware issue.

Harold

 

[Ktex]

Adding to Harold's suggestions:
Check the CMOS battery, if it's a Win 7 machine, it's 3-5 years old, and that's about how long those batteries last, minimum of 2.4 v but it should really be 3.0 v or better.