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Error encountered during conversion to GPT format.

Error encountered during conversion to GPT format.

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xX_Solares_Xx
Member
71
11-07-2025, 12:02 PM
#1
So my girlfriend got a new laptop, but Windows wasn’t installed, so I had to guide her through the setup. Everything went smoothly until the installation screen warned that you can’t install Windows on the SSD because it isn’t GPT. We opened Command Prompt and tried commands to convert it to GPT, which allowed the process to continue except for some parts that still failed and then returned to the main installation page. When we reached the drive selection screen, it kept saying the SSD wasn’t in GPT mode. The laptop only has an SSD, and I heard you could change it in the BIOS, but I’m not sure how or if it’s possible without being there in person. If you own an ASUS TUF Gaming FX505DV-AL026, any advice would be greatly appreciated.
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xX_Solares_Xx
11-07-2025, 12:02 PM #1

So my girlfriend got a new laptop, but Windows wasn’t installed, so I had to guide her through the setup. Everything went smoothly until the installation screen warned that you can’t install Windows on the SSD because it isn’t GPT. We opened Command Prompt and tried commands to convert it to GPT, which allowed the process to continue except for some parts that still failed and then returned to the main installation page. When we reached the drive selection screen, it kept saying the SSD wasn’t in GPT mode. The laptop only has an SSD, and I heard you could change it in the BIOS, but I’m not sure how or if it’s possible without being there in person. If you own an ASUS TUF Gaming FX505DV-AL026, any advice would be greatly appreciated.

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Hetchok
Member
172
11-08-2025, 02:40 PM
#2
The process doesn't display GPT during Diskpart's List Disk command. You must delete all partitions using Clean in Diskpart before converting to GPT. Also, be careful—removing your Windows installer drive and rebooting may affect the installation afterward.
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Hetchok
11-08-2025, 02:40 PM #2

The process doesn't display GPT during Diskpart's List Disk command. You must delete all partitions using Clean in Diskpart before converting to GPT. Also, be careful—removing your Windows installer drive and rebooting may affect the installation afterward.

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DatackerNew
Junior Member
14
11-10-2025, 11:18 PM
#3
You can't change it to gpt in the bios, this is a software thing. Did you clean the drive in disk part or delete all partitions? There is no need to convert from mbr, just start fresh and delete all the existing mbr
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DatackerNew
11-10-2025, 11:18 PM #3

You can't change it to gpt in the bios, this is a software thing. Did you clean the drive in disk part or delete all partitions? There is no need to convert from mbr, just start fresh and delete all the existing mbr

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mindcraft54
Member
66
11-11-2025, 04:19 PM
#4
The tool reported an issue with installing Windows because the drive was marked as MBR. Cleaning it again using DiskPart resolved the problem. It seems the fix was successful.
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mindcraft54
11-11-2025, 04:19 PM #4

The tool reported an issue with installing Windows because the drive was marked as MBR. Cleaning it again using DiskPart resolved the problem. It seems the fix was successful.

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Pecolo33
Junior Member
33
11-11-2025, 04:59 PM
#5
Start BIOS and ensure CSM Support is turned off. This restricts booting to UEFI and permits only GPT drives. 2) In the command prompt, enter 'clean' and press Enter before typing 'convert GPT'. 3) When prompted, wait for the conversion message and proceed to the next step on the partition screen—do not attempt manual partitioning; let Windows manage it.
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Pecolo33
11-11-2025, 04:59 PM #5

Start BIOS and ensure CSM Support is turned off. This restricts booting to UEFI and permits only GPT drives. 2) In the command prompt, enter 'clean' and press Enter before typing 'convert GPT'. 3) When prompted, wait for the conversion message and proceed to the next step on the partition screen—do not attempt manual partitioning; let Windows manage it.

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Frost_Pvp017
Member
225
11-13-2025, 09:06 AM
#6
Ensure you select "UEFI: <Flash drive model>" upon booting the USB.
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Frost_Pvp017
11-13-2025, 09:06 AM #6

Ensure you select "UEFI: <Flash drive model>" upon booting the USB.

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Angel_MP
Member
174
11-18-2025, 02:28 PM
#7
Hi, I understand your issue. You tried to run a lighter version of Windows 11 on your old laptop, but it’s not working smoothly. The main problem is that the system is trying to convert your SSD to a GPT format, which isn’t possible with your current setup. Have you checked if your drive has any partitions or errors before? You might want to try using a different tool or consult the manufacturer’s support for further guidance.
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Angel_MP
11-18-2025, 02:28 PM #7

Hi, I understand your issue. You tried to run a lighter version of Windows 11 on your old laptop, but it’s not working smoothly. The main problem is that the system is trying to convert your SSD to a GPT format, which isn’t possible with your current setup. Have you checked if your drive has any partitions or errors before? You might want to try using a different tool or consult the manufacturer’s support for further guidance.