If you get this error by browsing video files with Windows Vista, you've probably installed Nero Burning Rom.
To fix this problem, rename or delete the file "NeVideo.ax", located in "c:\program files\common files\ahead\dsfilter\".
Other possible solution:
http://www.jcxp.net/forums/index.php?showtopic=12152&st=20
Download Directshow filter manager, extract the exe to somehwhere. Open explorer, right click on the extracted exe and select run as administrator, allow the app to run.
Next, click the module column header (so click on module), this will sort the list by directory name (as you would to select a column in excel), scroll down and find the reference to the nero dsfilter folder and nevideo.ax - for example on my pc I looked for c:\program files\common files\ahead\dsfilter\nevideo.ax, I found 2 entries, u may have more or less. Double click each entry and change the filter merit to 00200000 then click set new merit. Close the window and repeat for each entry.