I made a new prefix since apparently there's no good way to selectively undo changes made through winetricks. I downloaded and ran the FE native windows installer, FallenEarth.msi, which seemed to work. FEUpdater.exe however fails very soon after launch, before it displays its own window on the "desktop." winedbg prints out: Unhandled exception: page fault on read access to 0x00000000 in 32-bit code (0x7dc50e0a). the backtrace shows: =>0 0x7dc50e0a in ieframe (+0x20e0a) (0x0034e5f8) 1 0x7dc50eec in ieframe (+0x20eeb) (0x0034e638) 2 0x7dc51b86 in ieframe (+0x21b85) (0x0034e6a8) 3 0x004147ed in feupdater (+0x147ec) (0x01123aa0) 4 0x576e6d67 (0x004bb804) 5 0x00452420 in feupdater (+0x5241f) (0x00416140) 6 0x00000088 (0xe8f18b56) some of the trace output before the crash: 0029:fixme:ole:TLB_ReadTypeLib Header type magic 0x00905a4d not supported. 0029:err:ole:TLB_ReadTypeLib Loading of typelib L"Y:\\fe\\FEUpdater.exe" failed with error 0 0029:fixme:ieframe:OleObject_Advise (0x13e2b8)->(0x1140654, 0x11406ac) 0029:fixme:ieframe:ViewObject_SetAdvise (0x13e2b8)->(1 00000000 0x1140654) 0029:fixme:ieframe:ViewObject_Draw (0x13e2b8)->(1 -1 (nil) (nil) (nil) 0x191c 0x11406c4 0x11406c4 (nil) 00000000) Any suggestions?