Hello. I am new here. Hope this is the right forum to post this. Anyway, I just built a pc with the Biostar MB Hi-Fi H61S3 and windows 7 home premium. Everything seemed to go great, until i started intermittently getting an error stating that there is an unknown usb device. i went to system, driver, details and copied all info and attach a file of driver details. Is there anyone that might be able to help me solve this problem? One thing that I would like to say is that I did delete the two default devices in printers and faxes so that now there is only installed my canon printer. If I need to give more info, I would be glad to do so. I have tried uninstalling and reinstalling this but i keep getting the annoying popup message of unrecognized device and it's very irritating. Thanks all. James.