Windows 7 Bug - Displaying Thumbnails of Side-by-Side MP4 files! at

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Old August 14th, 2013, 01:52 PM   #1
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Join Date: Sep 2009
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Windows 7 Bug - Displaying Thumbnails of Side-by-Side MP4 files!

I couldn't make stuff like this up. We're seeing this a LOT at the moment. On Win7 Ultimate 64-bit machines, the dllhost process continues to grow until it eats all available system memory. Here are the details:

The dllhost can eat up all memory till the system crashes. This could have several causes, one is a bug in the thumbnailsystem. If the deactivation of the thumbnailsystem can fix the memory leak, you know for sure. (One would probably have to reboot or kill the process to see any changes)

The update KB2670838 which also gets installed along with IE10 (!) has several side effects. One of them is the introduction of a memory leak when trying to generate a thumbnail for certain mp4 files, typically 3D Side by Side. Search for files which should have a thumbnail but have a standard icon (the current file causing the leak will also be unmoveable, undeleteable etc). The thumbnail cache plays a role in this too. If you have valid thumbnails for a file and install an update or codecs or would like to test this, there will be no error till the next time the thumbnail is actually created.

It is possible, that there are other causes for these problems as well and it is possible that not all systems are prone to that memory leak. Other side effects of the update point to a combo of intel and amd hardware.
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