I also contributed a lot of time to the ADB problem. (Galaxy P7510 vs Win7 64bit)
After struggling with non-offical drivers, android_winusb.inf, 64bit JDK, and even having virtualized a 32bit OS..,
finally I found a work-around! just come back to share with anyone concerns.
Reference: Connect to Android with ADB over TCPConnect to Android with ADB over TCP
The above instruction requires a PC which can ADB to your tablet over usb.
Better work-around is root your device firstly, and then download a adbWireless utility,
so you can switch your tablet to ADB TCP mode even without USB connection at all.
HTH!
