Windows 10 won't boot on AHCI without switching to IDE then back

steve108 said:

Ah, yes. Disabling good old Windows Fast Startup - maybe this will be the light at the end of the tunnel.

I suggest it because of this in the OP:

villannelle said:

This issue doesn't come up when rebooting the computer, only after turning it off and then on again.

When you do a reboot from Windows 10, Windows Fast Startup (which is different than BIOS Fast Boot) is bypassed. When you shutdown the computer from Windows 10, fast startup is used, if it is enabled. Disabling Windows Fast Startup (easy way is to disable hibernation) causes the shutdown and power on cycle to be exactly the same as the reboot cycle.

NavyLCDR said:

I suggest it because of this in the OP:


When you do a reboot from Windows 10, Windows Fast Startup (which is different that BIOS Fast Boot) is bypassed. When you shutdown the computer from Windows 10, fast startup is used, if it is enabled. Disabling Windows Fast Startup (easy way is to disable hibernation) causes the shutdown and power on cycle to be exactly the same as the reboot cycle.

Thank you for the explanation - this is something that slipped my mind - I usually suggest it for boot problems.

Glad you came by and hope it's the light we've been looking for

steve108 said:

Another thing to try:
Turn off the PC, remove the coin battery, unplug the AC, try to turn the PC on a few times to remove residual discharge, then put the battery in, then AC, then go into BIOS and make sure the time/date go reset since we're trying to reset the BIOS and set everything in the BIOS the way you need including date and time.

If your motherboard has a BIOS reset jumper, you can use that instead of pulling the battery etc.

Then once you get it to boot, repeat your power off / on boot test and see if it's fixed or not.

Hello Hello!! I'm back from the dead

All this time I've been learning where to find the coin battery in my motherboard, how to remove the graphics card so I can access said coin battery, how to remove the coin battery... Oh, the amount of dust I've cleaned!

Now when I rebooted my screen said there was an issue with CMOS and to adjust time and date, and sent me into BIOS. I didn't change anything, exited and windows booted correctly. But I've had this happen before, where there's an error that sends me into BIOS and then it boots correctly, so I will now attempt to turn it off and back on again. Wish me luck again!

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villannelle said:

Hello Hello!! I'm back from the dead

All this time I've been learning where to find the coin battery in my motherboard, how to remove the graphics card so I can access said coin battery, how to remove the coin battery... Oh, the amount of dust I've cleaned!

Now when I rebooted my screen said there was an issue with CMOS and to adjust time and date, and sent me into BIOS. I didn't change anything, exited and windows booted correctly. But I've had this happen before, where there's an error that sends me into BIOS and then it boots correctly, so I will now attempt to turn it off and back on again. Wish me luck again!

OMG!!! Okay okay windows has booted correctly, I repeat, WINDOWS HAS BOOTED CORRECTLY!!!

I don't want to celebrate too early but... I think my problem is solved now!! Thank you to everyone that helped, steve I could kiss you right now!!!!!!!

I'll mark my thread as solved, let's hope this is the end of it!

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NavyLCDR said:

I suggest it because of this in the OP:


When you do a reboot from Windows 10, Windows Fast Startup (which is different than BIOS Fast Boot) is bypassed. When you shutdown the computer from Windows 10, fast startup is used, if it is enabled. Disabling Windows Fast Startup (easy way is to disable hibernation) causes the shutdown and power on cycle to be exactly the same as the reboot cycle.

This makes total sense too, I'm thinking this can also be what fixed my issue!! Either way I'm super grateful you took the time to help me out! I'll keep this in mind for the future

Excellent news. It was probably Windows Fast Startup...

"powercfg -h on"
Then do more testing if you want to know for sure

It's always best to try a single solution first so you know which one was the solution.

It's a "Single Event Effects" Google it...