Steam not validating game files
Browse to the HKEY_CURRENT_USER\Software\Microsoft\Windows NT\Current Version\App Compat Flags\Layers key in the registry editor and delete any values associated with Steam.Steam should now launch without any compatibility mode errors.Windows doesn’t “save” CPU affinity between sessions – when you close Steam and reopen it, it will use its default CPU affinity settings.
The easiest way to do this is by launching a game, alt-tabbing out, opening the task manager, right-clicking the game’s process on the Processes tab and using the Set Affinity option.If none of these solutions helps, try Googling the problem – you may have run into a game-specific problem with a game-specific solution or just a more obscure Steam bug.If a game fails to load, crashes as soon as it loads, or crashes when you reach a specific level, your game’s files may be corrupted.Since the B5 release I have noticed that "Verify Game Cache" is frequently reporting that one file needs to be downloaded.I became suspicious about this, so this morning I repeated it although I had not had any noticeable problems with the game when I finished last night. So I tested this by verifying again immediately after the first verification. Well, good, but I am starting to think I need to check this every time I start up the game ---- something is corrupting one of the files. Question is does anyone else see this frequent 1 file corruption issue? I do have three custom races in the game: the Wisps, the Borg, and the Little Green Men, as well as all the standard races. EDIT: and when I closed my session this morning, again one file had to be downloaded again. I have edited some xml files to create my custom race (I don't like the limited in-game option) Steam never asked me to verify game cache.
However, this may not always solve the problem – if the problem has already started occurring, the gameplay may be glitchy until you relaunch the game.