Couldn't find firmware (Allwinner & AllwinnerTech dot com), couldn't find USB drivers (never could get pc & tablet to see each other) - frustration & ignorance (I'm newb as it gets) allow me to ask why you need a Win device to root an Android device? I still don't know the answer to that, but I successfully rooted my tablet without a pc & here's how I did it:
1) dl these to your tablet:
-- "framaroot 1.5.1" (source: xda-developers "Alephzain" THANK YOU)
-- a file manager (source: google play store - I have ASTRO)
-- "root checker" (source: google play store)
2) pre-root tablet settings:
-- settings>security>device administration> enable "unknown sources"
-- settings>developer options> enable "usb debugging"
3) run "framaroot 1.5.1" - it's done in an instant. run "root checker" to verify.
4) go back into settings & disable "unknown sources" & "usb debugging"
After reading so many pc req'd root methods, I'm really curious to find which devices this method WON'T work on (& why).
This tablet was a gift & something I felt safe using as a learning tool before trying anything fancy on my LG MS910 phone.
It already has ICS 4.0.4 on it & is obscure enough where it won't surprise me if I never find a 100% functional JB ROM (I keep reading about touchscreen issues) - but little successes (like this root) motivate me to continue learning & experimenting.
Thanks for letting me share.