Windows 10: After the w10 may update my pc turns right back on a few seconds after I shut it down

The May update started it's updating yesterday when I shut my pc down. So I expected it to finish today on start up. This it duly did. I now have the issue that about 5-10 seconds after my pc powers down (shutdown through start-->shutdown) it powers itself right back on again. I have disabled power up via USB devices (keyboard and mouse) in the bios, I have unchecked 'allow this device to wake up pc' on the kb/m in device manager and have disabled wake for tasks and quick start up. Now I am stumped. Any ideas? It was fine last week prior to the May update.

:)

 

PC only shuts down on a second try


Hello,

I posted here yesterday asking for help on a similar problem yesterday: GPU keeps working (fans spinning) for a few seconds after shutdown - Windows 10 Forums

Basically, what happens now is as follows: When I press shutdown from start menu and the PC screen goes black at the end of it, I can hear components stopping their work, but pretty much all fans keep working (PSU fan, case fans, GPU fans). They work for 20-30 seconds and then I hear a Mobo beep (the same one you hear when you turn on your PC) and the PC boots back like it's nothing. When I reach login screen and shut down again from there, the PC fans again keep spinning after components turn off, but only a few seconds this time. The PC components then turn on and immediately turn off together with the fans.

Sorry for the poor phrasing, English is not my native language and I try my best here.

This complicated double-take shut down process only began after I disabled fast startup in Windows 10 (some guys on various forums suggested that I do that). Before I disabled them, the problem was like the one I linked to in the beginning. The whole problem started after I installed a second HDD. During the installation I also removed the GPU to allow me to fix some cables.

Besides the shut down, the PC seems to be working just fine. No crashes, no BSODs - nothing. Only this strange shut down.


Things I've already tried:

• Disabling fast startup
• Removing my second hard drive
• Changing its SATA plugs
• Changing SATA cables
• Changing HDD power connector cables
• Removing and putting back the GPU
• Updating chipset driver
• Shutting down from login menu

 

PC turns on for a split second then shuts off

hrm...so the original symptom is that your PC would turn itself off after a couple of seconds. you reset the bios and now it doesnt shut down, but instead it just sits at the screen as it looks for a network address? try resetting your bios again.

 

PC turns on for a split second then shuts off

When I hit the power button my rig turns on then shuts off less than a second later. All my fans spin then it shuts off then tries to turn on again but does the same thing. Im thinking its my psu but I dont want to jump to anything yet.