This will probably also apply to other INF based installation for that matter. A simple command line saved me hours of trouble:
rundll32 C:\Windows\SysWOW64\setupapi.dll,InstallHinfSection DefaultInstall 0 C:\Path\To\huffyuv.inf
Run the above with admin privilege and bam, HuffYUV correctly appears in my codec list.
P.S. If you’re looking for a lossless codec, maybe take a look at Lagarith. It claims to be an improvement to HuffYUV and supports multi-processor encoding. It also comes with a dedicated installer so there’s no need to tinker with the command line just to install the codec.