Are you talking about upgrading another version of Windows to Win 7 Home Premium or about a failed installation of a Windows Update?
The BIOS is accessed by pressing F2 at startup (at the ASUS splash screen). But before doing that, can you boot into Safe Mode (hitting F8 repeatedly at the ASUS splash screen) to stop the update process?
I think I understand - you have 4 of 30 updates installed. Boot into Safe Mode and use Windows System Restore to restore your system to a time before the Windows Update installations. If it is still updating in Safe Mode, you may want to wait to see if it completes in a few minutes, or try stopping any UPDATE.EXE or MSIEXEC.EXE processes in Task Manager.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT