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Crashed Windows Caused by Tweaking Repair tool

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jroe:
I have a Windows 8.1 Pro computer that I worked on a few weeks back after a hard disk crash - after running the repair tool it started crashing explorer.exe and flashing the desktop background - I could not find a fix and though it was a corrupt drive so I rebuild the entire system. 

Now 3 weeks later something broke dnsapi.dll - I tried a number of fixes and decided to run the file, registry, and service permissions fixes in the repair tool.  After doing so the same issue has returned.

Even in safe mode and another user profile.

The exact error is:

The instruction at 0xa4ed82f0 referenced memory at 0xa4ed82f0.  The memory could not be written. 

It lists as an explorer.exe Application error but also occurs with task manager and some other applications.  I can use task manager to launch command prompt and a few programs.

I did use secedit to restore the default security database and now I can see my desktop between flashes which didn't occur before. 

jroe:
A bit more info.

I just noticed in my task manager that "Thumbnail Handler Extraction Host" is spinning up new processes like crazy with each crash

There is reference online to this crash loop being caused by Norton - This system does not have norton, never has and does not have the referenced CPL those posts mention.

There is reference to disabling skydrive being a fix but I've not been able to try that.

The same errors also occur when trying to repair the office install which I attempted to see if skydrive was the cause.

Julian:
95% of the repairs are registry related. It will not corrupt your system files. all you have to do is reload the registry to before the repairs and anything it changed would go back to the way it was. But what it sounds like is something different. have you tried running 
--- Code: ---chkdsk c: /r
--- End code ---
can you run that from an administrator elevated command prompt and go to event viewer and post the log. I posted a picture with steps to take.

jroe:
I have run checkdisk and there are no issues

I also restored the registry using the application and it did not correct the issues

Julian:
can you post the chkdsk log for me?

I'm thinking maybe a memory issue. run this from elevated command prompt choose to restart and run the test.

mdsched.exe

let me know what it tells you

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