Hi RM,
You really do need to install the Bitlocker update KB3133977, yet only after you have printed the ASUS instructions which PKCano linked to. You probably will not experience this issue, unless you took special steps to install Windows 7 to use EFI boot. Anyway, the ASUS fix for this issue is easy to implement so long as you have full access to your computer’s BIOS.
PKCano also mentioned that there are three versions of KB4474419, dated 3/11, 8/12 and 9/9. The previous two versions were superseded by the latest 2019-09-09 version. You only need to install the latest v3 version which you can get from here:
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4474419
In the above link, look at the top third of the list for the appropriate update for your version of Windows 7 which is dated 9/9/2019.
Best regards,
–GTP