Today when I came to the office and started my PC, my computer suddenly stopped working and turned into a blue screen with the following message code (the message might not accurately coded as below):

FATAL SYSTEM ERROR
The windows Subsystem process terminated unexpectedly with status of oxc0000005(0×77e6107d 0×00f8e1d0)

I can’t really recall the exact message code but it does stated sort of  ‘Heap Space Memory Complete’ and also asking me to contact the administrator for further assistance.

I tried to reboot several times but everytime when I successfully login to the Windows, after several minutes, it will stopped working and turned into a blue screen. I tried with booting in Safe Mode (F8 key) and also with ‘Last Known Good Configuration’ but it still doesn’t work.

What is the first workaround that you can try when facing this situation? My colleague did a screenshot of the message code and booted the PC in the Safe Mode (F8). Then, he made a quick search about the message code in the Google. I really never thought about this solution. Well, I’m really lack of experience of facing this kind of problem.

Cause and Solution
Yes. A quick search in Google helps a lot. What we had for the search result about this issue so far is related to the installation of third-party program. It reminded me of installing Freebie Notes yesterday afternoon. So, what I did was to remove the program when I access my Windows in the Safe Mode. Guess what? It works. I have no problem with my computer at all for the whole day.

Root of the Problem
Why third-party programs cause such problem? In fact, I’m a bit surprised that the program causes such problem because I had been installing this program in my previous workplaces for several times and even in my personal laptop as well. Everything is working fine. I still don’t understand why it doesn’t work well this time.

I found a Microsoft KB on How to troubleshoot a “STOP 0xC000021A” error which explains some of the reasons that causing such failure and also the proper solution to resolve this problem. As for my case, the most obvious of the root cause definitely is the ‘An incompatible third-party program has been installed’.