How to purge detected application ?

Hi there,

I'm searching a solution about to block IE8. It's okay for it, i found it on forum. But i must have the file signature. I applied a policy for all computers, so i have the list for all iexplore.exe (ie8 - ie9 - ie10 - ie11 etc) and i cant truly found ie8 in all of this. So i created an "UO" dedicated for xp to found only ie8.

BUT ! SEPM doesnt allow to purge detected application. How can i do to reset/purge it ?

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Thanks in advance !