I was recently trying to update KMPlayer 64X while display fusion was running. The installer threw an error stating that C:\\Programs\KMPlayer 64X\VSFilter.dll could not be updated.

I then downloaded one of many file-lock managers and determined that DisplayFusion.exe had a lock over the file. Once I kill it, the installation continued without any issues.

What's going on here?

I just had the same problem. Had to use Process Explorer to find out which program was using KMPlayer's VSFilter.dll and it was DisplayFusion.

"2024"
It seems that there isn't the answer that I was searching for.
Though it seems to be for VobSub and TextSub, I'm not sure why displayfusion locks the file VSFilter.dll or why this file uses displayfusion for some reason, thus I'd like to know why.

Hey, I don't have any Multi-monitor taskbar>shortcuts for KMPlayer or specific settings for this player in displayfusion.
After the most recent KMPlayer update, this file needs to be unlocked for updating and renamed in order to prevent problems with the upcoming update.

Thank you.