Same for me, using the latest version of wine from GIT. It was working just two days ago, so I reckon the 11-Jan-2011 steam update (http://store.steampowered.com/news/4868/) broke Steam in wine :-( > wine --version wine-1.3.11-180-g856da7e > wine Steam.exe fixme:process:SetProcessShutdownParameters (00000100, 00000000): partial stub. fixme:urlmon:CoInternetSetFeatureEnabled 5, 0x00000002, 1, stub fixme:urlmon:CoInternetSetFeatureEnabled 10, 0x00000002, 1, stub (at this point Steam popped up asking me for my password, which I entered) err:ole:CoGetClassObject class {77f10cf0-3db5-4966-b520-b7c54fd35ed6} not registered err:ole:CoGetClassObject no class object {77f10cf0-3db5-4966-b520-b7c54fd35ed6} could be created for context 0x1 fixme:wbemprox:wbem_locator_ConnectServer 0x1dce28, L"ROOT\\CIMV2", (null), (null), (null), 0x00000080, (null), (nil), 0x42bbeb8) fixme:winhttp:WinHttpGetIEProxyConfigForCurrentUser returning no proxy used fixme:winhttp:WinHttpGetIEProxyConfigForCurrentUser returning no proxy used fixme:dbghelp:elf_search_auxv can't find symbol in module > It doesn't seem to work with wine 1.2 either (different error message there though).