Windows – How to make Windows 7 show thumbnails for MKV files

Install the DivX Plus Tech Preview of MKV on Windows 7; your file is perfect because it's H.264 video, aac audio in MKV, which I te same as DivX Pkus HD. It's totally free, and more info is at http://www.DivX.com/en/windows-7 and labs.DivX.com

Two options:

1. Remove media preview, by typing in: regsvr32 /u shmedia.dll

2. From this page:

Click Start>Run, type REGEDIT and click Ok. Then make your way to this InProcServer32 key:

HKEY_LOCAL_MACHINE >SOFTWARE >Classes

CLSID > {87D62D94-71B3-4b9a-9489-5FE6850DC73E}> InProcServer32

Right click the InProcServer32 key and choose Delete. And that's all there is to it. This will prevent Windows from loading shmedia.dll when you work with video files and thus you should no longer have problems deleting or moving any video files. Also if you have a video file you can't delete now, deleting this key will allow you to do so. If not, log out and log in again to delete the file.