Report OA Prevents Duplicate cleaner from starting in Other Emsisoft products Posted December 4, 2012 Now MPUI player (a general video player which had no problems earlier) does not work or hangs. Tested with OA off, works perfectly. Had no option but to exclude it in OA. MPlayer for Windows? *downloading* I'm probably going to have to test these programs when I get some time. If there does appear to be an issue, then I will talk to Andrey and see if we need to open a bug report on this.