Reply from Gigabyte Technical Support on the problems installing Windows 7 64-bit
Although the problem is now fixed, I have had this reply from Gigabyte (which took around a week):
Are you upgrade from Windows XP to Windows 7?
Do you have alternate HDD or Windows 7 copy to test?
Please try to reset the CMOS –
1) Disconnect the power cord from the power supply. Remove the CMOS battery (the flat silver disk) from the motherboard using a srew drive or similar implement. Leave it out for a minute or two, then replace it and power on the system. The BIOS settings should have been reset, allowing the computer to boot.
2) Go into the BIOS – “Load optimized default”
3) Save settings and exit.
4) If this doesn’t work then try “Load Failsafe default”
So.. judging from the generic approach, I would say it’s not a well known problem, by them at least. But it’s another option to try out – resetting the CMOS. I have read this on a forum elsewhere as well, although I’m not sure if this means it’s a trusted method, or whether they just had the same generic reply from Gigabyte Tech Support!