: You must install the Street Fighter X Tekken 10th Anniversary Edition Patch to fix GFWL issues and enable modern features.
Since you cannot buy it directly, here are the most common community-supported ways to play: Street-Fighter-X-Tekken-Download-PC-Game
The game is older, so most modern machines can run it easily: Requirement Minimum Specs Recommended Specs Intel Dual Core 1.8GHz Intel Core 2 Duo 2.6GHz RAM GPU NVIDIA GF 6600 / ATI X1600 NVIDIA GF 8800 / ATI X1950 VRAM Storage OS Windows XP Windows Vista / 7 🎮 Key Features How to Play Street Fighter x Tekken Online on PC - RPCS3 : You must install the Street Fighter X