https://bugs.winehq.org/show_bug.cgi?id=38960
--- Comment #19 from mactrix b.adamski@mac.com --- (In reply to Fincer from comment #16)
What if a Steam game requires Windows 7 to be used at least but I'm forced to use Windows XP mode because of crashing steamwebhelper.exe?
You can set Windows 7 as default and then add the steamwebhelper.exe specifically in winecfg and assign Windows XP to it. It's quite a nice feature that winecfg allows different modes for different program files.