Thanks for your replies.
I ran Windows Memory Diagnostics, and there was no error found. I also ran the Error-checking tool found in Windows' Disk Properties, for all mi disks, and no error was found.
I do normally use two keyboard layouts/languages, but they definitely don't produce this output. Nonetheless, I have removed the different keyboard/language layouts/services. From now on I'll be using only the
EN English (United States)
Keyboard
US
setting. I'll run it like this for a few days and see if the problem goes away.
AppGameKit IDE 2017.04.24 (Steam)
Windows 7 Professional 64bit, Service Pack 1
Dell Precision T7400:
Intel Xeon CPU E5405 @ 2.00GHz (2 processors)
16GB RAM
Nvidia GeForce GTX 560 Ti
Samsung SSD 850 EVO 250GB and SanDisk SDSSDXPS960G