Here's the original problem reported, followed by initial response:
------- problem report -------
My current version of MC25 crashes far too often to sink any more money into it.
You have a forum to upload log files but file size limit is too small, so I try to sleuth myself. No go.
Works most of the time but craps out from time to time. Was hoping it would act like a true server that could be on 24/7 and rock solid, but no.
------ My reply below ------
Most crashes are:
1. Antivirus software
2. Drivers
3. Bad files
Download and install the most recent build of MC25 first or just use the trial version of MC26.
Uninstall Kaspersky (as a test). On Windows 10, use only Windows Defender.