Windows Vista Basic: 1.5 GHz or any Dual Core Processor Integrated 64 MB Shared Graphics / 128 MB Dedicated Graphics Card 750 MB RAM
Windows Vista Home Premium / Ultimate / Business: 2 GHz or any Dual Core Processor Dedicated 256 MB Graphics Card 1.5 GB RAM or 1.75 GB RAM if you are using Integrated 256 MB Shared Graphics
Tips: 1. Windows Vista Home Premium / Ultimate / Business lags while running in 1 GB RAM due to constant memory usage of 50%+ even if there are no applications running. 2. 32-bit Operating System and Processor is recommend.