I can't find crash_log, is it in the starting folder when you click on the extracted file? Also it is in downloads, so no there should be no problem with permissions. Maybe it has something to do with my graphics card? I bought a refurbished dell optiplex 755 which has decent specs but an abismal graphics card and I am unable to play some games due to it, I have obtained a new graphics card that should work for my computer and will tell you if anything changes.