Make sure that all the drivers for your devices are available for Windows 7, Esp. motherboard drivers.
From this Biostar Page, No drivers (other than Audio-Realtek) for Win 7 is provided by manufacturer, Hopefully Everything should get detected automatically in Win7.
Or Vista Drivers should be ok for windows 7 also (Most of the cases it does)! http://www.biostar.com.tw/app/en/mb/driver.php?S_ID=289
Let's hope for the best! If nothing works out, get ready to go back to XP/Vista, whatever you have now!