Sorry if this has been covered before but I scanned through 4 pages and didn't see anything on this issue. GSC 2013 will not install for me, I tried a couple months ago and again today, multiple download attempts - same problem. I continue to get errors (many files - .cam .MAS, .gdb, .tga, ...) "The source file is corrupted" : "D:\GSC2013\GameData\Locations\xxxxx\xxxxx\xxxx.xxx" I typically have zero problem with this computer - new build 6 months ago and run many different racing sims (all Simbin titles, pCARS, Assetto Corsa, F1 2013, and others - this is the only one I cannot install. Windows 8.1 Pro x64 i7-4770K 16 GB (2) HD7850 (crossfire) Any ideas? I would like to give this one a go.