Realtek Lan driver ver:7.48.823.2011 (Windows 7 64bit ver:7.48.823.2011)
ASRock > Fatal1ty Z68 Professional Gen3
I also see a teaming driver for the dual network chips on this board: Realtek Teaming driver ver:15.0
Googling on Realtek RTL8111E produced this link to Realtek's website and drivers for that chip:
Drivers for USB 2.0 have not been provided for download for quite a while, they should be provided by Windows 7 during its installation, no downloading required. The USB 2.0 ports on the board's I/O panel should be working fine once Win 7 is installed, and a simple USB mouse and keyboard should work when connected to the I/O panel during the Windows installation.
Sometimes a brand new board with no OS installation will force you to use a PS2 keyboard before Windows is installed.
Did you install the Intel Chipset/INF files, from the INF driver ver:220.127.116.111 file on your board's download page? Without that all of the hardware on your board may not be identified correctly and cause errors like you apparently get.