"Unable to import some files because quicktime is not installed"

[Scott.Brownlee]

That's the error I'm getting now when trying to import any kind of video file. From my three hours of internet futility, I understand Apple has ceased support for Quicktime for Windows, and that Avid was working on a workaround. Does anyone know if there is a solution to this? As it stands, I cannot add any video files to my Pro Tools sessions, which is a bit of a kick in the teeth when you're doing a film soundtrack...

I have tried a new install of Pro Tools (twice), before and after reinstalling Quicktime. Quicktime Player just says I need to install Apple Application Support, which I also cannot find.

My specs:
Windows 10 64-bit, Intel i7-8700 3.20 GHz, 6 cores, 32 GB RAM, SSD for main Windows drive and Pro Tools, instruments on a combination of internal HDD and external SSD (USB 3.0), Pro Tools sessions stored on internal HDD, running Pro Tools 2018.12.0, with a Scarlett Solo audio interface.