you can either update mmswitch (
http://www.morgan-multimedia.com/index.htm )
or get rid of it
if you don't know what installed this filter and want to uninstall it, you should look for a mmswitch.ax file then go to start-->run
and type
Code:
regsvr32.exe -u path\mmswitch.ax
where path is the location of the file
P.S. sorry for the long time before answering, I was on a holiday 8)