Cant isntall WinSCP

Hello, when i try to install WinSCP and double click the installer in pops up a app in my task bar for like half a seconde and imidietly closes and then like 2 min later it shows a warning on the screen saying "winscp shellexecuteex failed code 5" plz help.

Please start the installer with switch /log=C:some\path\setup.log and post the log.