When I go to bed at night my Dell computer is switched off but when I get up in the morning it's restarted it's self

[pcmartin037]

Dell computer switches it self on in the middle of the night

 

[Cloudy1]

Try disabling fast Startup - assuming that you have Windows 8, 8.1 or 10.

See here for a solution for Windows 10:

https://www.windowscentral.com/how-disable-windows-10-fast-startup

The procedure is very similar in Windows 8, 8.1 so have a Google.

I have had the same issue with a couple of machines and disabling fast Startup is generally a good fix for the problem ... I.e., with fast Startup enabled it is not a true shutdown and unless you can isolate the problem to a specific device which may allow the computer to reboot with fast Startup enabled ... this is sort of a solve all.

Give it a go and see if it solves the issue and if so your boot time is really not going to be impacted dramatically anyway.

 

[MLG_No_Scope]

it has to do with your automatic maintenance mode in your pc control panel settings

go to your control panel -> system and security -> action center -> automatic maintenance. turn off: "allow scheduled maintenance to wake up my pc"

hope it helps