Cannot get to desktop need to start in safe mode

Reyals70

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I cannot get to my desktop because it says "Reboot and select proper boot device." I tried to reinstall windows 8.1 with the disc but it says the partition is GTP style. I also tried to reset my PC but it says the partition is missing. I want to try to start in safe mode but I don't know how to when f8 doesn't work and I can't get to my desktop. I can get to the command prompt.
 
Do a search on here for that exact same error. There are a couple of threads, along with the fix that Brink wrote out that is in Tutorials.

Does it still happen if you press the Windows key and D key? What is the computer mfg & model #?
 
I tried to reinstall windows 8.1 with the disc but it says the partition is GTP style.

Quote from this post: UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

Tip   Tip
Error message when you boot in Legacy BIOS Boot Mode: Windows cannot be installed to this disk. The selected disk is of the GPT partition style. (see screenshot below)

That is because Windows can only be installed to MBR disk in Legacy BIOS Boot Mode, but you plan to install Windows on a GPT disk.

- Boot in UEFI Boot Mode, so you can use GPT (GUID Partition Table).
- But if you want to use MBR (Master Boot Record) partition table, then delete all partitions on the disk.

Windows cannot be installed to this disk. The selected disk is of the GPT partition style.png

Error message when you boot in UEFI Boot Mode: Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. (see screenshot below)

That is because Windows can only be installed to GPT disk in UEFI Boot Mode, but you plan to install Windows on an MBR disk.

- Delete all partitions on the disk, so you can use GPT (GUID Partition Table).
- But if you want to use MBR (Master Boot Record) partition table, then boot in Legacy BIOS Boot Mode.

Windows cannot be installed on this disk. The selected disk has an MBR partition table.png
 
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