In order for you to play Braid on Windows with minimal graphics settings, your computer must meet the following requirements
Operating System:
Microsoft® Windows® XP / Vista / 7
Processor:
1.4GHz or faster
Memory:
768 MB or more
Hard Disk Space:
200 MB or more
Video Card:
Pixel Shader 2.0
DirectX® Version:
DirectX® 9.0c
Controller Support:
Microsoft Xbox 360 Controller for Windows