Thanks this problem was solved last night , i just find out that google chrome was the reason , actually GC caused a lot of problems on my computer .
So i couldn't run affinity app , but also beside this i had no clue that also because of chrome my start up menu was not working on my computer, also my printer .
I deleted Google Chrome and reinstall affinity thru firefox , and could run the setup, also noticed my startup menu is working without constant restarting window explorer , and i will check my printer later on .
I have no clue why G CH was messing up everything , thanks Eva