[Request] All BIOS versions for Lenovo Legion T5-26IOB6 (Type 90RT)

Hello everyone,

I’m looking for all the previous BIOS versions for the Lenovo Legion T5-26IOB6 Desktop (Type 90RT).
Here are the system details:

I’m specifically looking for older BIOS versions because I’d like to downgrade from the current one.

Unfortunately, Lenovo only provides the latest version on their website, and I haven’t been able to find archived BIOS files elsewhere.

If anyone here has backups or official installers for any older BIOS revisions for this model, I’d be extremely grateful if you could share them.

Thanks in advance!


Edit by Fernando: Thread title shortened

You better ask Lenovo support for these…
O54KT22A
O54KT20A
O54KT1DA