Well, it’s been a while since I’ve had a tricky repair like this. System came in and it would continuously flash the desktop then a blue screen in a loop of about 1-2Hz. It was possible to start task manager, but tricky to interact with it.
Errors included:
msftedit.dll is either not designed to run on Windows or it contains an error.
System restore fails with error “%1 is not a valid Win32 Application” 0x800700C1
In Safe mode: “Unknown Hard Error.”
The faulty file was size 2,900,992 bytes.
The details tab was devoid of content.
I replaced it with a copy I found on another system in C:\Windows\SoftwareDistribution\Download\1a946a1a7028fc73f13d3f0d25a4dc97\amd64_microsoft-windows-msftedit_31bf3856ad364e35_6.3.9600.17415_none_c6dbf3ed0aeefff0\msftedit.dll and rebooted. (Had to take ownership and delete the original first, which I did from a USB to SATA adapter but might be possible in safe mode on the same machine.
I don’t know where this corrupt file came from. It didn’t scan as malicious. Was dated 24/9/2014