Windows 10: Cannot clean install Win 10 UEFI mode (Toshiba Satellite C75A)

When you attempted the clean install the bios was in uefi.
Had you tried to clean install in legacy?
Can you create a brand new windows 10 iso to perform the clean install?

When you power on the computer what do you see?
When the clean install failed how did you retrieve the panther log?

 

see first post - can install in CSM / legacy bios
Have created sevearl Win 10 isos
logs retrieved by booting from Win PE USB

 

Some o the problems in the log were related to product ID and language. But if you can perform a clean install in legacy I 'm puzzled why there were problems in UEFI with these reported events.
What would happen if you use Macrium to clone another computer and restore on this drive?
Backup and Restore with Macrium Reflect Backup Restore Tutorials

 

Ive got an HP but if I clone that to a Toshiba I'll get an assortment of problems - incompatible motherboard, display, hardware, drivers etc etc etc + licensing issues. I suppose I could try just to see if it boots

 

See if you can install Legacy without any problems. Then see if you can convert to UEFI:
Convert Windows 10 from Legacy BIOS to UEFI without Data Loss Installation Upgrade Tutorials
How to Change Legacy to UEFI in Windows 10/8/7

 

I can install Win 10 in legacy / CSM mode no problem at all.
I then tried running MBR2GPT.EXE:
/Validate option tells me it will work ok
When I run it it trashes something and the disk wont boot (CSM or UEFI)
I've run it from Win PE and Win 10 neither option works

As its an oldish laptop (nearly 5 yrs) i'll just install in CSM mode and use it as a backup. What is strange is that it originally came with Win 8 in UEFI mode and a few updates later was running Win 10 UEFI

Thanks for trying to help

 

You could try installing it manually.

Boot from PE (for example this Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums). You'll need another USB with the Windows installer on it.

1. Partition the disk (EFI, MSR, C, recovery) like you had in post #1 (except that was for Windows 8 not 10 and recommended order has changed - not that it matters really)
Code: rem == CreatePartitions-UEFI.txt == rem == These commands are used with DiskPart to rem create four partitions rem for a UEFI/GPT-based PC. rem Adjust the partition sizes to fill the drive rem as necessary. == select disk 0 clean convert gpt rem == 1. System partition ========================= create partition efi size=100 rem ** NOTE: For Advanced Format 4Kn drives, rem change this value to size = 260 ** format quick fs=fat32 label="System" assign letter="S" rem == 2. Microsoft Reserved (MSR) partition ======= create partition msr size=16 rem == 3. Windows partition ======================== rem == a. Create the Windows partition ========== create partition primary rem == b. Create space for the recovery tools === shrink minimum=500 rem ** NOTE: Update this size to match the rem size of the recovery tools rem (winre.wim) plus free space ** rem == c. Prepare the Windows partition ========= format quick fs=ntfs label="Windows" assign letter="W" rem === 4. Recovery tools partition ================ create partition primary format quick fs=ntfs label="Recovery tools" assign letter="R" set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac" gpt attributes=0x8000000000000001 list volume exit[/quote] UEFI/GPT-based hard drive partitions | Microsoft Docs

2. Copy EFI stuff to ESP Code: W:\Windows\System32\bcdboot W:\Windows /s S:[/quote] (check drive letters obviously)

3. Install Windows Code: dism /Apply-Image /ImageFile:\install.wim /Index:1 /ApplyDir:W:\[/quote] You can think about recovery partition later (but it is all in same link here as steps 2 and 3 above)
Capture and Apply Windows, System, and Recovery Partitions | Microsoft Docs)

If the issue is installing in UEFI mode rather than booting it then this will work. Considering it booted in 8 it should boot in 10 also as nothing changed afaik.

I did the same except I ran the steps above and installed Windows while the disk was in a external USB enclosure on a second PC and then physically removed the disk and put it in my laptop. It worked fine and started up from the OOBE stage (where it asks you your user name and so on).

It wouldn't take long to try (half an hour I guess) but if it doesn't work running CSM isn't that bad really. It won't run slower or anything.

 

Hi Guru, thanks. It's not 100% clear
Step 2 - I get error - "BFSVC error - could not open the BCD template store. Status = [c000000f]
Step 3 - do I create the image file from an existing working Windows installation?

 

No from an installation ISO you download from Microsoft.

I got the steps 2 and 3 backwards but they were correct in the link Capture and Apply Windows, System, and Recovery Partitions | Microsoft Docs

1. Partition drive with previously mentioned script - this assigns letter W to new Windows, S to System and R to recovery.
2. Apply (using DSIM) windows image (install.wim) from ISO to W volume.
3. Then use bcdoot.exe (from W volume) to apply system files to S volume (defined in step 1).
Code: W:\Windows\System32\bcdboot W:\Windows /s S:[/quote] It is explained in more detail in link above. Sorry for the confusion.

 

thanks. I believe the latest Win 10 ISO uses a "install.esd" not a *.WIM file? I came accross this earlier in my endeavours

 

Depends where you get it I think. In any case if you have esd use that. Something like this if your installer USB has been assigned the letter D Code: dism /Apply-Image /ImageFile:\Sources\install.esd /Index:1 /ApplyDir:W:\[/quote] One other thing, the /Index:n specifies what edition of Windows to install. You can check which index is which edition like this - make sure you apply Home or Pro correctly. Code: PS C:\Temp> dism /get-wiminfo /wimfile:e:\sources\install.wim Deployment Image Servicing and Management tool Version: 10.0.16299.15 Details for image : e:\sources\install.wim Index : 1 Name : Windows 10 Home Description : Windows 10 Home /EA Size : 16,071,950,070 bytes Index : 2 Name : Windows 10 Pro for Workstations Description : Windows 10 Pro for Workstations Size : 16,156,718,191 bytes The operation completed successfully. PS C:\Temp>[/quote] I'm pretty sure this works the same for install.esd but I only have .wim

 

have you also installed/updated the BIOS before clean installing Win10 in UEFI mode for the Toshiba C75a laptop, charles? latest BIOS version for C75A seems to be 1.60.

on the North American Toshiba support site, there are two specific models for C75A, which are C75-A7120 and C75-A7390.

I haven't done a clean install of Win10 on my dad's Toshiba Satellite C55Dt-A5306 laptop (mid-2013 model), which originally came with Win8.1 Core/Home edition and upgraded it to Win10 Home a few years ago; the BIOS was upgraded (to v1.80 for the Toshiba C55Dt-A laptop model only) long before I upgraded from Win8.1 to Win10. If I wanted to upgrade to the Pro edition of Win10, I'd pay extra for that license.

 

Thanks the latest applicable BIOS for my Tosh Sat C75 version is 1.3 tried 1.6 but it wouldn't load, just got message that it was not for my machine.
I'll stick with CSM/legacy mode now. I'm pretty sure it's all down to the age of the laptop and maybe a not too great BIOS