Missing entry point

Recently downloading Frostwire,I experienced problems viewing with Windows Media,and it appeared that QuickTime may be the preferred viewer.Not a necessary/consuming priority,it was ignored until yesterday.I was offered to download the latest version of QuickTime.Immediately upon launching from Frostwire to QuickTime,Windows security informed and offered missing QT files. But warned files publisher could not be verified and reported to carry viruses.I reloaded QT two or three times,removed Itunes (not compatiable with 64 bit?)but continue to be told (when attempting to load movie)QT needs to be updated.Likewise an error message constantly pops up stating...QPService.exe- procedure entry point PowerReadACValue cannot be located in the dynamic link library POWRPROF.dll.This may not even apply to QuickTime,but problem did not exist before downloading.I would greatly appreciate any advice or insight.