Random crashes and freezes

[mahesh]

I need some help identifying the root problem(s).

I get random reboots when using opera (they had gone away mostly, but recently returned after upgrading to Jammy).

But more regularly I have issues when transferring numerous files, it will freeze the entire system often beyond REISUB.

I also have issues with certain downloads, it will get mid-way through and freeze forcing a reboot(s). After resuming the download repeatedly it never completes. Deleting the download and re-starting doesn't seem to help. I have had the item downloaded before, however due to a faulty update I had to try a clean install.

I assume at least the download and transfer issue has the same root cause.

I had tried a memory and hard-drive check early on and it said they were fine (though who knows after all the reboots).

What would you like me to add, and where should I add it? (log files, system details, etc.)