Windows reinstall manually? Does license remain?

Question

Windows reinstall manually? Does license remain?

Fade yoloswag 20

This is probably a silly question, but

if I wipe everything from my windows drives and then use a bootable usb drive to boot windows and reinstall it, will it keep my windows 11 license? or do I have to buy a new one?

I have been having an issue ever since I installed hypervisor where my pc crashes on bootup, safe environment crashes, factory reset crashes, everything crashes before I can fix anything. So I feel like wiping the slate clean and starting fresh is my only option at this point. I have been trying for 2 days to get it to work, nothing works. I just want to be sure I don't need to shell out another 140 bucks if I do it this way

Neil D 34,280 Reputation points Volunteer Moderator

2026-08-18T18:25:50.6533333+00:00

As a note: you don't need to wipe the windows system disk before using the USB installation, the process of a clean install will do that for you.

Boot from USB, select Language > Install now > Customised install. At customised install select each partition and Delete until there is only unallocated space. Select Next and follow the prompts.

You may need to visit the manufacturers website to install their drivers. (note all personal files will be deleted so a backup is essential)
Fade yoloswag 20 Reputation points

2026-08-20T01:46:28.5666667+00:00

update, even booting from the usb crashes. So I am out of ideas. Thanks for the responses though.
Ivan B 123.1K Reputation points Independent Advisor

2026-08-20T05:50:58.8133333+00:00

Hi,

What is the laptop model or the desktop configuration?

If it freezes right at USB startup, there might be a faulty component; did you change any BIOS settings?

Thanks.
Fade yoloswag 20 Reputation points

2026-08-20T20:56:21.3033333+00:00

my motherboard is an msi z370-a pro, I have a gtx 1070ti graphics card and 32gb of ddr4 2667mhz ram and I recently added a 3rd hard drive, so I have 2 ssds, the old one is 500gb and the new one is 1tb and 1 hdd that's 2tb, but linux runs fine on my 2nd ssd while windows doesn't even boot without crashing. I tried increasing the voltage of my cpu cores from 1.2 to 1.3 but I haven't tried to reinstall windows again, yet. idk if it got changed to 1.2 during a bios update and it wasn't enough to boot properly. I have not tried to boot through the usb while running 1.3v cpu cores yet.

Answer accepted by question author

Ivan B 123.1K Independent Advisor

Hi,

Yes, as the Q&A Assist notes, you can—as a precaution—write down your product key; this allows you to use the same license you already purchased if you perform a clean install using the USB method.

To note down your current key, you can download ShowKeyPlus to save your license details for extra security.

https://apps.microsoft.com/detail/9pkvzcprx9nv?hl=en-US&gl=US

However, if you reinstall Windows and it does not activate automatically (in the case of a digital license), you can try the activation method for after a hardware change.

https://support.microsoft.com/en-us/windows/activation/reactivating-windows-after-a-hardware-change

Please consider rating the question (accepting the answer or not) and visiting the Microsoft Q&A community if you have further questions.

Thanks

0 comments

2 additional answers

Your answer

Neil D 34,280 Reputation points Volunteer Moderator

2026-08-18T18:25:50.6533333+00:00

As a note: you don't need to wipe the windows system disk before using the USB installation, the process of a clean install will do that for you.

Boot from USB, select Language > Install now > Customised install. At customised install select each partition and Delete until there is only unallocated space. Select Next and follow the prompts.

You may need to visit the manufacturers website to install their drivers. (note all personal files will be deleted so a backup is essential)
Fade yoloswag 20 Reputation points

2026-08-20T01:46:28.5666667+00:00

update, even booting from the usb crashes. So I am out of ideas. Thanks for the responses though.
Ivan B 123.1K Reputation points Independent Advisor

2026-08-20T05:50:58.8133333+00:00

Hi,

What is the laptop model or the desktop configuration?

If it freezes right at USB startup, there might be a faulty component; did you change any BIOS settings?

Thanks.
Fade yoloswag 20 Reputation points

2026-08-20T20:56:21.3033333+00:00

my motherboard is an msi z370-a pro, I have a gtx 1070ti graphics card and 32gb of ddr4 2667mhz ram and I recently added a 3rd hard drive, so I have 2 ssds, the old one is 500gb and the new one is 1tb and 1 hdd that's 2tb, but linux runs fine on my 2nd ssd while windows doesn't even boot without crashing. I tried increasing the voltage of my cpu cores from 1.2 to 1.3 but I haven't tried to reinstall windows again, yet. idk if it got changed to 1.2 during a bios update and it wasn't enough to boot properly. I have not tried to boot through the usb while running 1.3v cpu cores yet.

Answer 1

Yes—reinstalling Windows 11 on the same device generally does not require buying a new license again.

Supported cases from the provided guidance:

If the device has a digital license, the same edition of Windows 11 can be reinstalled on that device without entering a product key.
During setup, if prompted, select I don't have a product key.
After installation, Windows 11 should activate automatically online.
If the license is linked to a Microsoft account, signing in with that same account helps activation.
On many modern devices, the product key is embedded in firmware, so it is applied automatically if the installed edition matches.

Given the boot crashes described, using installation media is a supported path when recovery options and reset are not working.

Important points before wiping the drive:

Back up important files first if anything is still accessible.
Use the same edition that was already installed on the PC.
If the device uses BitLocker/device encryption, have the BitLocker recovery key available before resetting or reinstalling.
A USB flash drive used for installation media should be blank and at least 8 GB, and its contents will be deleted.

If Windows 11 was already activated on that PC, a clean reinstall on the same hardware should not require paying again.

References:

Answer 2

hi

Yes, your Windows 11 license will remain. It's tied to your hardware/Microsoft account, not stored as a file on the drive. So after a clean install with the bootable USB, it should automatically reactivate once you're connected to the internet — no need to buy a new one.

If it doesn't auto-activate, go to Settings > System > Activation > Troubleshoot, or just sign in with the same Microsoft account you used before to relink it.

Also, before wiping everything — your hypervisor crash issue might actually be fixable without a full reinstall. Try uninstalling any recently installed virtualization software (Hyper-V, WSL2, VirtualBox) or checking BIOS virtualization settings (VT-x/AMD-V). Worth a shot before going through the whole wipe process.