On my Asus laptop, Asus GL752VWDH71.1, I added a compatible SSD drive,
SAMSUNG 850 EVO M.2 2280 250GB SATA III 3-D Vertical Internal SSD Single Unit Version MZ-N5E250BW
I then transferred the W10 OS to the new SSD drive using a Samsung program. No real problems.
The laptop boots very quickly. But in the following months, the laptop would randomly boot to a 'fix' screen instead of the OS.
With continuing W10 updates the problem got worse. I early on found out that I could go into BIOS and I noticed that the
original HDD was selected for boot. It has no OS on it as I wiped it after transferring the OS to the SSD drive.
My solution was to change to boot order back to the SSD in BIOS. This month it happened just about every other boot,
usually from sleep mode. A shutdown and restart didn't help. Then I happened to look in Disk Management.
(Control Panel>Administrative Tools>Computer Management>Storage>Disk Management) I saw this problem:
I had two EFI partitions. The one on the HDD didn't serve any purpose as the OS was on the SSD.
EFI system partitions are what direct the BIOS to the correct boot drive.
I searched to find if the HDD EFI partition could be deleted, but it was a protected system partition.
It appeared DISKPART and a few other partition management programs could delete it,
but not much information available if that would damage or delete the 300GB or so of data on the disk.
DISKPART is part of the OS and accessed through a command prompt.
I backed up the most important files and used DISKPART to delete the partition and just leave it as
'unallocated' space. That worked and there was no longer a boot entry for the HDD drive. Problem solved.
I'm guessing I missed a step in the OS transfer. But no more boot problems. And no damage to the 300GB of data on the HDD. I only wish I had caught the problem earlier.
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Last edited by redwudz; 25th Feb 2017 at 15:09. Reason: Typos