Windows installs these drivers. If it is incorrect, contact Microsoft. I have never heard of them installing a 32bit driver on a 64bit program. I don't think it's possible. I think there is something else involved here.
The following Discrete AMD Radeon™ Graphics products support up to WDDM 1.1 and DirectX® 10.1:
- ATI Radeon™ HD 4000 Series /ATI Mobility Radeon™ HD 4000 Series Graphics
- ATI Radeon™ HD 3000 Series /ATI Mobility Radeon™ HD 3000 Series Graphics
- ATI Radeon™ HD 2000 Series /ATI Mobility Radeon™ HD 2000 Series Graphics
These graphics products must be installed using display driver version: 8.970.100.9001. This driver is provided as a courtesy and only available via Windows Update. Please enable Windows Update and allow it to detect and install the appropriate driver.
NOTE: ATI Radeon™ HD 4000/ATI Mobility Radeon™ HD 4000, ATI Radeon™ HD 3000/ATI Mobility Radeon™ HD 3000, and ATI Radeon™ HD 2000/ATI Mobility Radeon™ HD 2000 Series Graphics reached peak performance optimization on October, 2013. No additional driver releases are planned for these products.