@MindfulMaverick@piefed.zip definitely do Step1 from here.
Make sure it's memtest+ and not the others.
It might fail quickly, it might take all night, but this will find bad RAM.
If it passes, move on to the next steps... I'd also add: check PSU
System Redundancy
Holiday Upgrade Disasters
Backups.. Pull or Push?
Laptop uptime - since suspend
Open Source Developers Are Exhausted, Unpaid, and Ready to Walk Away
Any experience of Diode?
Today, enjoy your self-hosted home automation
Stumbled on to StormShield - opinions?
Solar PV vulnerabilities
Ansible Playbook - How do I reverse engineer a running system?
OLD System... Upgrade or re-install?
Automated Cooling
Vivaldi, now with added VPN
Options for "iPlayer will stop working on this device"
Any MythTV Users Here?
NAS vulnerabilities
Sanity check: Vivaldi high CPU usage
pfSense DHCP (& DNS) Performance
pfSense DHCP / DNS performance
Pause alerts during the night
Just think of all those Azure and AWS VMs needing age verification as they're spooled up, destroyed and receated every few minutes...