help me empty trash, adobe flashplayer installer .dmg in use
i attempted to update my adobe flashplayer because i was prompted, but then became skeptical, and moved it to the trash. now i can't even empty it out of the trash. i get a message that tells me "The operation can’t be completed because the item “AdobeFlashPlayerInstaller_15au_ltrosxd_aaa_aih.dmg” is in use." ... i know i was just in the very first stages and i did not complete the download or update. i want that file out of my computer. how do i do this? please and thank you
MacBook Air, OS X Mountain Lion (10.8.5)