MKVToolNix v90.0

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[Manchita]

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You have No permissionsI'm having a little problem with MKVToolNix 67 (x64). I tried the installer here and one from Nsane but when I try to start MKVToolNix I get this error message:-"The procedure entry point Create DXGIFactory2 could not be located in the dynamic link library dxgi.dll" I Googled for a solution, tried running sfc/ scannow but the error message persists. I installed the portable version in my Portable Apps Platform and it launches without any problem....but I'd like to know why the installed version gives this error  I'm using Win 7 (a64) by the way. I would appreciate any advice. Thanks.

[chillgates]

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[Manchita]

Many thanks for your reply Chillgates. I've downloaded what I think is the correct dll...I'm a bit nervous about installing it so I'll wait for a while to see how my computer acts over the next few days. When the error message first appeared it was a surprise because I have used MKVToolNix for years without any problem....and, since the portable version works fine, I was going to ignore the installed version and just use the portable one.
I searched my system with the program "Everything" and it shows there are 6 dxgi.dll's already present:-
C:\Windows\System32            (22/08/2018)
C:Windows\SysWOW64           (22/08/2018)
C:\Windows\winsxs\amd64...   (21/11/2010)
C:\Windows\winsxs\amd64....  (22/08/2018)
C:\Windows\winsxs\x86...        (21/11/2010)
C:\Windows\winsxs\x86....       (22/08/2018)

Thanks again.

EDIT (hours later):- After all the hours I've spent Googling and reading possible causes for this problem and trying different MKVToolNix installers, I finally stumbled onto Reddit and found some other guys who had the same problem...it's related to Windows 7. One of the guys pointed us to https://mkvtoolnix.download/windows/cont...it/67.0.0/ which lists revisions of MKVToolNix 67.0 made during the last 5 days. I downloaded the latest installer and it worked immediately, no error message. I imagine there are other people out there trying to figure out why they are experiencing this "dxgi.dll" error.