Combatman12

Turns out on the first PC it was because I taped over the power button hdd LED a year earlier. Then I fresh installed windows on to a new drive, and realised I needed to install drivers. Oops...

There's a difference here in diskpart and it seems important, but I'm stumped for now...

Well I used mbr2gpt and now I can boot with the new computer to a BSOD "inaccessible boot device error"

OK so, I'm moving my drives to a new PC. On my old PC I cloned my whole C drive to a different drive and made that my C drive. I couldn't select that drive as a boot drive in the boot load order, but I could still get into windows if I manually selected that drive on my startup . My new motherboard doesn't have that manual option so I can't boot into windows. What can I do? I think I need to do some fiddling with the partition labelling.

Looks like that was one thing, the power switch was stuck. But now enabling CSM causes the board to stop POSTing, so I'm not sure how to boot into Windows. https://pcpartpicker.com/list/4XqRrr

My current hypothesis is that it's because my power button on the case is stuck... will report back.

Nevermind, I can't archive my thread. I've got a brand new PC and an old one. The old PC stopped POSTing. A CMOS reset did the trick for a day, then I couldn't get it to boot after so I decided to upgrade. The new PC has new parts except for the drives and GPU. The new PC has booted to the BIOS with all components. Restarting always hangs, and requires a manual restart; this happened with a minimal installation too. Turning on CSM makes it not POST and turn off quickly. A quick CMOS reset doesn't fix, removing the GPU and drives doesn't fix it. Got lucky and had this process repeat again, probably after resetting CMOS but I'm not sure. Plugged everything back into the old machine and it seemed to work for a few hours just fine. All drive health is good. Benchmarks didn't cause crashes at 99% CPU and GPU load. So I think my new motherboard has something wrong with it, and one of my GPU, drives, or SATA cables causes faults only some of the time. Something is causing instant power off.

Sorry, that's a legacy thing it was Win8 at the time I built it but it's not anymore. I'm gonna post a new thread since I think I have a significant change.

Reset CMOS did not help.

Booted to BIOS multiple times, I changed to boot off a USB then it only powers on briefly then turns off. When BIOS settings changed the automatic restart wouldn't do anything so I had to power off at the PSU or wall. I don't think any cables are touching the board, and unplugging USB devices doesn't fix it. Will try resetting CMOS soon after posting but taking a break for now. The parts are all new except the drives and GPU, the PSU in https://pcpartpicker.com/list/4XqRrr

It's for a friend, but yes.

The PC will be used for: League Of Legends Team Fortress 2 Batman Games CS:GO Overwatch Microsoft Office Storing Pictures Windows 10 The person I'm helping to get this PC won't be able to build it and I'm not willing to build it incase of an accident, so I would like a PC that's premade, the peripherals don't need to be fancy but a good monitor could be included if it fits within the price range. I'm uncertain about if they would like expandability. What components are most important to least important: Graphics Card CPU RAM Hard Drive Monitor Keyboard and Mouse PSU, Motherboard The PC total cost including shipping to the UK will need to be under £550 or $800.

Are there any companies which I could send my PC parts to who will assemble the PC for me? (In the UK only)

If I get this I'd overclock it like I overclocked my PC!

I disagree. I've had mine for over two months.