After waking it up at 8am yesterday morning to read the battery level I shut it down fully again. At 9am this morning I turned it on and it just started to power on the (Surface appeared on the screen)
and then it shut down. To power it on again I had to connect the power supply and it showed 0% charge. So in 32 hours it completely drained its battery when it was shut down. I used to leave it a few weeks between uses sometimes and it would still have
plenty of charge as long as it had been shut down or hibernated.
Let's hope it's not a battery health problem. If so, these methods below suggested won't help..
- Try to turn off fast start up
Open control panel, choose small icon in "view by" box... then look for Power Options, select Choose what the power button does, click Change settings that are currently unavailable, "uncheck" Turn on fast start-up, click Save changes
or
- Use command prompt to shut down
Open command prompt (as an administrator suggested).. type shutdown /s
then hit enter (if any dialog box appear just hit enter or click close)…. wait few seconds before it starts shut down itself
P.S. I think turn off fast start up won't help in your case, but give it a try won't do any harm too