Missing CT number

[Matt1979]

Updated BIOS with 12/2018 update and now get the missing CT number. That's the only change. System Information says CT number is "HP".

Can't roll back bios because I stupidly tried the bios update again. Is there somewhere I can get the previous BIOS file? UPDATE: I found the previous BIOS. Attempted to use it and the update option was greyed out.

[Paul_Tikkanen]

Hi:

You can find all of the previous BIOS versions on your notebook's support page.

On the BIOS update file you installed, click on the Previous Versions tab...

https://support.hp.com/us-en/drivers/selfservice/HP-15-Notebook-PC-series/8502685/model/9111893

[Matt1979]

Thanks. I tried the previous version but update wasn't allowed.