My company had something like this: In 1 or 2 months, a bunch of laptops of only one specific type+revision erased all user profiles spontaneously. Other lapto

My company had something like this: In 1 or 2 months, a bunch of laptops of only one specific type+revision erased all user profiles spontaneously. Other laptops from that same vendor did no such thing. We ended up writing them off and donating all (20? 30?) of them for COVID remote schooling after one swallowed the data of a high impact manager. Data loss was minimal (thank god for backups) ,but a lot of people were angry . It never became 100% clear what happened, my vague recollection of the partial reconstruction was: * For some reason, this type of laptops decided to add 10 000 to the year in the RTC clock. The number was so high the bios couldn't even represent it, giving up at 9999. * Security policy dictates removal of profiles older than, I think, a year. So in the year 12019, all user profiles should be deleted. * The computer takes about an hour to boot, slowly deleting each profile. * After all profiles are deleted, the now blank laptop installs a patch to the timezone files and returns to the year 2019, then proudly declares itself ready for user logon. * The windows event logs did weird things in the date column, it just could not represent the date. Had to export the files to XML before it would show what year it was in. * If you interrupted the delete by rebooting the thing, then unplugging the network so no time servers would be available, then correcting the year in the bios, it would at the next reboot do a prompt forward time travel to 10 000 years in the future, then continue slowly removing profiles. As is usual in this kind of situation, HP support pointed to Microsoft, Microsoft to HP, and both of them to us doing some (unspecified) kind of misconfiguration.