Hi HeithCliff66,
Perhaps run speccy from here
https://www.ccleaner.com/speccy/buildsSelect the portable version so you can run it without being connected to the internet.
Then select file, Publish snapshot and copy the link here.
What I will look for is bios version, ram make and if they are on the the motherboard QVL
What programs are running
And driver versions as well as lots of other things.
Also you could check in event logs any errors happening when the lockup occurs. as shown here
https://kb.blackbaud.com/articles/Article/75433Does the whole computer lockup ie mouse and keyboard not working or just the internet browser. ?