So you installed Vista, then installed 7 to dual boot. But you did not need to install drivers for Seven? That will work, but there might be some reduced functionality.
If you remove Vista, there will be no problems with drivers.
System Manufacturer/Model Number Hera OS Windows 7 Ultimate x64, Mint 9 CPU Intel i5-2500k Motherboard ASUS P8P67 Pro Memory 2x 4Gb Corsair VENGEANCE DDR3-1600 Graphics Card NVidia GeForce N260GTX Twin Frozr Sound Card Realtek HD OnBoard Audio Monitor(s) Displays ASUS 24" Monitor Screen Resolution 1920x1080
Keyboard Razer Tarantula Mouse Razer Lachesis PSU Cooler Master Real Power Pro 750W Case Cooler Master Haf 932 Cooling Fans Hard Drives G.SKILL Phoenix Series 60GB SATA II MLC Internal Solid State Drive (SSD)
SAMSUNG Spinpoint F3R 1TB 7200 RPM 32MB Cache SATA II Internet Speed not fast enough
System Manufacturer/Model Number Hera OS Windows 7 Ultimate x64, Mint 9 CPU Intel i5-2500k Motherboard ASUS P8P67 Pro Memory 2x 4Gb Corsair VENGEANCE DDR3-1600 Graphics Card NVidia GeForce N260GTX Twin Frozr Sound Card Realtek HD OnBoard Audio Monitor(s) Displays ASUS 24" Monitor Screen Resolution 1920x1080
Keyboard Razer Tarantula Mouse Razer Lachesis PSU Cooler Master Real Power Pro 750W Case Cooler Master Haf 932 Cooling Fans Hard Drives G.SKILL Phoenix Series 60GB SATA II MLC Internal Solid State Drive (SSD)
SAMSUNG Spinpoint F3R 1TB 7200 RPM 32MB Cache SATA II Internet Speed not fast enough