Hi guys n gals

Can anyone point me in the right direction please on how to flash my wife's U30GT2 tablet with new firmware looking to put kitkat 4.4.2 kasty of this site on it. It is currently on 4.2.2 stock but is running very laggy, I have tried all the methods iv'e seen on here but windows 10 won't recognise the tablet  when trying to put it in flash mode and using rockchip batch tool only get a pink indicator.(It sees it when switched on and I can transfer files to from it)Win 10 wont allow me to update the driver in device manager for the one that comes with the batch tool whichever version I try ( 1.6 - 1.7 )

I have been pressing vol+ up and power button to get it in flash mode without any success. The tablet is not rooted at the moment but I would like it to be once done. Any ideas ?

Any help will be greatly appreciated Guy's 

Thanks in advance  I have already wasted 4 hrs on this please help if you can.

Silk67