Fixed it myself.
Trying to complete installation of a game under Origin. It goes up until when it has to install dotnet35sp1. Installation gives an error popup and fails. Manually running the installer in the prefix fails with an error “You must ‘Turn Windows features on or off’ in the Control Panel to install or configure Microsoft .NET Framework 3.5.” Finally trying to add the dll via winetricks, but it also fails, with winetricks window just closing. Any suggestions are welcome.
How did you fix it? I have the same problem