I tackled the USB driver over on another forum. Here is a copy of the post..
I also figured out how to manually install with the download from the site.
Under Device Manager, under portable devices (while Transformer is plugged in), you will see Transformer TF101. Right click it and choose to update driver manually. Choose the location where you unzipped MTP folder of the download. This should update the 64 bit windows driver then.
As for the WIFI question in last post. Darter, if you click(touch) the WIFI icon (next to speaker icon) on the lower right, does it show your wireless network? If it does or doesn't, click the icon under the time clock that is brought up under the next window.. This should expand changeable options such as wifi, then click wifi. Does this list your SSID network? Click your network SSID and re-enter the password.