6 Posts
0
1560
May 6th, 2022 21:00
Cannot enable TPM on my Inspirion 5477
Hi,
I want to upgrade my desktop (Inspirion 5477) to Windows 11, but found that I can't upgrade without enabling TPM.
So I looked at the settings in the BIOS, the setting turned grey and cannot change.
I followed this article.
https://www.dell.com/support/kbdoc/en-us/000128616/cannot-enable-trusted-platform-module-tpm-as-option-is-greyed-out-in-bios
Turned off Secure Boot still no luck
Under Security Settings: Disable PTT, Enable TPM, Activate TPM, then save the changes
I know that my computer should be upgradable.
Thanks!
Tenny
No Events found!
RoHe
10 Elder
•
45.2K Posts
0
May 12th, 2022 11:00
@tennyy - So having Legacy enabled explains why you can't enable TPM. Once you disable Legacy, you may need to enable Secure Boot to enable TPM, even though Secure Boot isn't required for Win 11.
You should still be able to boot from USB to install Win 11 with Legacy disabled, as long as you plug that USB into PC with power fully off. Then power on and tap F12 to open the boot menu and choose the USB boot option.
But why do you want to do a clean install of Win 11? Why not just do an update to Win 11 which will keep all your personal files and apps so you won't have to reinstall everything? (NOTE: Always a good idea to back up your personal files before doing an update like this!)
You can use the "Windows 11 Installation Assistant" here, rather than the "Create..." option on that same page.
EDIT: You will still have to enable TPM before running the Installation Assistant.
JOcean
9 Legend
•
12.6K Posts
0
May 7th, 2022 05:00
Your system is compatible and the Windows 11 system requirements are here. Secure Boot and PTT have to be enabled. I have to assume you have not tried those settings yet. Also run the PC health check found here to find out what settings you now have that do not meet Windows 11 requirements.
tennyy
6 Posts
0
May 7th, 2022 07:00
Hi JOcean,
Thanks for your reply.
I have no idea why TPM/PTT cannot be enable on my BIOS, just in grey text.
I saw other topic indicate can install windows 11 without enable Secure Boot, it depends on TPM.
tennyy
6 Posts
0
May 7th, 2022 07:00
It said may be need reinstall the windows again, so I will backup my data first and then try.
Thanks for your idea.
JOcean
9 Legend
•
12.6K Posts
0
May 7th, 2022 19:00
Happy to help out. This Dell support page may help as well. Keep in mind that TPM and PTT cannot both be enabled per the support page. PTT alone enabled will enable TPM firmware.
Spikesdad
1 Rookie
•
78 Posts
0
May 9th, 2022 20:00
Probably late for this, but yes, Secure Boot is NOT required to be enabled. The official Win 11 requirements list from Microsoft says only that the computer must be Secure Boot capable. That's not the same.
The PTT is what the Intel-based BIOS uses to get to the TPM setting.
tennyy
6 Posts
0
May 9th, 2022 21:00
Hi,
If secure boot no need to enable, then I am curious to know why I can't enable the Firmware TPM.
I don't see any word of "PTT", just a "Firmware TPM".
PS. I already updated to latest BIOS verison.
Thanks!
RoHe
10 Elder
•
45.2K Posts
0
May 11th, 2022 12:00
@tennyy Did you make sure Legacy option ROMs is disabled in BIOS? It that's enabled, you can't enable TPM. See table 4.
And on some PCs models, you can't enable TPM unless Secure Boot is also enabled. Not sure if that applies to your model, but if TPM is still grayed out after disabling Legacy options, enable Secure Boot and see if you can enable TPM now.
tennyy
6 Posts
0
May 12th, 2022 00:00
Hi,
Right now the setting is "Enable".
If I change to "Disable", can I still use USB Flash to install Windows 11?
tennyy
6 Posts
0
May 12th, 2022 18:00
Hi RoHe,
I will try disable the Legacy setting on later.
In order to activate the Windows 11, I need upgrade it from my existing Windows 10, then I will format it and clean install Windows 11 again.
RoHe
10 Elder
•
45.2K Posts
0
May 12th, 2022 20:00
I'm confused...
Why do you want to update from Win 10 to Win 11 and then do a clean install of Win 11? An update to Win 11 saves you the trouble of installing all your apps and configuring all your settings again. So why waste time/energy doing both?
If you really just want to clean install Win 11 and all your apps, just do the clean install. There's no need to update first.
The Windows Product Key is embedded on the motherboard so it should automatically activate Win 11, even if you only do a clean install, without doing the update first.
But, if for some (unlikely) reason Win 11 doesn't automatically get activated after a clean install, just log into the Microsoft account you created. It may -or not- be an actual Microsoft email address, depending on how you set things up with Win 10.
Either way, you will have to disable Legacy and enable TPM before updating to, or clean installing, Win 11. There are some registry hacks to get around having to enable TPM, but why mess with any of that? Your PC has the TPM option in BIOS and Dell fully supports this model with Win 11. And having TPM enabled provides an extra layer of security.