[Webmaster]

Only guessing but maybe scheduled tasks or updates?

[freddo]

go into the power settings and make sure that the setting for the power button is set to switch off sounds like it is set to hibernation or sleep

[tvtechnology]

It happened to me once before - I found some rogue piece of software causing the issue.

Unless as Freddo has mentioned, there's a wake or hibernation settings issue.

https://turbofuture.com/computers/Why-D ... -By-Itself An article for your review on the subject.

Paul
www.televisiontechnology.eu