XPS13 (L322X) Win7 Driver Issues

I just installed Win 7 on my XPS13 L322X and have everything working with these exceptions:

1.  The A15 BIOS update fails with “Unexpected error, please reboot and try again” Code 0x00000207. I have downloaded it twice and saved it to the desktop but same error occurs. I currently have A10 running.
2.  Two devices still do not have drivers after I followed all your steps:
    – Intel 7 Series/C216 Chipset Family USB 3.0 Extensible Host Controller Installation Disk – 1E31 (hardware ID is DEV_1E31)
    – Unknown Device (Hardware ID ACPI\INT33A0)

Can anyone identify drivers for these?

Plus I have a trivial issue with my Inland Bluetooth mouse: I can’t get it into Discoverable mode to pair it with the XPS13. It shows up in the Bluetooth Devices pane but it doesn’t work. Any ideas?

Thanks!

Geoff in NJ