Solution Offered by Microsoft Support is Incomplete
Windows Media Player always defaults to x64 for me--and I don't mess with any of that shít any more. Since WMP has no native .srt support, you can kill two birds with one stone by installing Local Subtitles for WMP.
It's a background...
Misdirected mothering instincts
Nobody doing mission-critical work needs to be warned not to tinker under the hood. Early adopters are in it for the experience and experimentation--even when the consequences are not well-understood, one accepts the inevitability of unexpected results.
Unless...
I had the same problem. Windows Media Player will open .mkv videos after unsatisfactory installation but they are flipped horizontally (mirrored and upside-down).
I also tried hand-registering CoreAVCDecoder64.ax with 64-bit regsvr32.exe but Windows Registration Service still crashes (appcompat...