K-Lite does provide several benefits. The most important one being that it actually contains the latest version of MPC-HC (1.7.15 atm) and the latest version of LAV Filters (which is what MPC-HC uses...

K-Lite is not responsible for your problem. K-Lite (and other packs as well) use a whole different type of codec (DirectShow) then what Groove uses. Groove only uses the standard Media Foundation...

It actually does ask for permission! There is a page during installation titled "Additional Software Offer" with accept/decline buttons. Besides the optional offer it is totally clean.
Since you...

Disabling "Fast boot" in your BIOS may help with the black screen. It is a bug in the NVIDIA driver.

The default player only plays HEVC if your system contains a GPU with HEVC hardware acceleration capabilities. It is probably for licensing reasons.

You need to delete the .mov values and subkeys in those two keys. Should be straight-forward when you see the contents of the keys.

To disable thumbnails delete these keys:...

Because his problem is not directly codec related, but most likely due to a driver issue. Some older graphics cards are not fully compatible with Win10.

If you have a video that doesn't play with...

In case of F-Secure you should disable its DeepGuard function. That can cause MPC-HC to crash or freeze on opening. Which video card do you have?

This is probably a driver problem. Re-install your graphics driver. Another fairly common cause is a compatibility problem with a security tool (such as AVG, F-Secure, EMET, HitmanPro). Did MPC-HC...

With K-Lite you can probably also transcode the files with Plex.

nero forum

No, the settings you have selected are safe. The only risk is when using the browser plugin, or when opening a maliciously crafted file.

I have seen the same thing happen with huge .ts files.

This update works a complete OS upgrade. So a lot of things get reset to defaults. It also re-installs drivers. So you probably need to update your graphics driver.

There are two shell extensions that deal with multimedia content. Thumbnails and the PropertyHandler. You already tried replacing and disabling the first.

You can disable PropertyHandling through...