Pressing Play and nothing happens

Hi ! i've played 1.8.9 for almost a year and this problem never accured i use forge btw ! when i press play nothing happens ! when i open up my task manager i see javaw.exe as a inactive process ! please help ! i've tried every thing ! i've uninstalled and installed minecraft again and that worked ! but for once so i have to do the same thing again whenever i wanna play minecraft .. i've uninstalled java and installed the newest version ! i 've uninstalled my version of forge and minecraft countless of times ! So yeah please help me and thank you