Download address for the MTK65XX Driver:
Download and extract attached driver package
Enable usb debugging in settings > developer options on your phone
Open Device Manager in Control Panel

Right-click the device name (e.g. MT65xx Android Phone or some other device which was detected) and select Update Driver Software. This will launch the Hardware Update Wizard.
Select Browse my computer for driver software and click Next.
Click Browse and locate the USB driver folder you’ve extracted in step 1
If asked select “Android Composite ADB Interface” or one which compatible with your device and click Next.

Follow instructions and finish driver installation.
Driver and flash tools: https://docs.google.com/file/d/0B4AdByfaH4T0SWFRMU1sdmhvWUE/edit?usp=sharing

VIA : http://www.chinaecarts.com/news/archives/1198