Unable to Import Video Sonar Platinum on Windows 10

So I recently bought a new work computer. I've been transferring all my programs and files over to the new one and it's been a fairly laborious process.

Currently I seem to have everything working save for one crucial element: I cannot import any video files into Sonar.

What happens is if I import a video file, I get the error message "Unable to Import Video, unrecognized video format." I get this message with every type of video format including video files that worked in Sonar on my old computer. Strangely, following one failed attempt to import a video file, whichever session I failed to import the video with can no longer even attempt to import a video. The "Import Video" feature is not grayed out in the file menu, but after the initial failed attempt clicking "Import Video" no longer even brings up the dialog box giving me the option to import videos. Furthermore, if I save that project, close it and attempt to reopen it, Sonar becomes stuck about 3/4s of the way through opening it and I am locked out of that project from then on.

I've been trying to get cakewalk tech support to help me with this, but they no longer have phone support and they are very lackadaisical in responding via email. I know I have a film score project coming up in the next week or so, so I'd like to get this issue sorted out by then.

Does anybody know what is going wrong? 

Thanks for the welcome and thank you for your reply!
I have tried a bunch of different video formats, including .avi and .mp4. None of them seems to be working at all.

The weirdest part is that on my old computer, with the same instance of sonar, many of the video files that *aren't* working now were working just fine. I don't remember having any issues on my old computer with sonar not importing video files.

So I installed the standard pack, but I'm still receiving the error message "Unable to Import Video, unrecognized video format." And after the first attempt at importing a video, the sessions still lock me out if I save, close and reopen them.

Aaaagh, this is so aggravating. What else should I try?

Is it possible that the audio bit/sample rate of the video is causing the problem?  Does it match the Sonar setting?

So I can't quite figure out where in the get info panel it will tell me what the bit rate or sample depth of the video files is, but I've switched Sonar itself to several different bit rates and sample depths and changing them has no impact on the ability of Sonar to import video files.

Thanks for the response. Apparently the version of Windows 10 I have (Windows 10 N) doesn't come with it, though other version of Windows 10 *do* come with WMP

may be related to this http://www.cakewalk.com/Support/Knowledge-Base/2007013353/SONAR-Launch-Error-for-Missing-MF-dll
 

Well, it's just a version of Windows 10. I don't really understand the difference between Windows 10 N or Windows 10 K or Windows 10 KB. 

And I did switch it to the new video engine and it appears to work. I am able to import some video files. Still not all the video files I was able to on the old one, but some of them import and the ones I import into can import multiple video files without any errors and I can save and re-open them.

So I think I had multiple issues, but I think the most egregious one was the one fixed by your recommendation.

So THANK YOU! Thank you so much Brando and SKOOK. You guys rock.