Normally SDB will download the driver in the **android-sdk-windows\extras\google\usb_driver** path
Here are the steps that worked for me:
- Enable USB debugging.
- Do to device manager, right click on ADB device and click update driver software.
- Select "Browse my computer for Driver Software"
- Select "Let me pick from list of Device drivers on my computer"
- Click on "Have Disk" option.
- Select the driver path **android-sdk-windows\extras\google\usb_driver** (path of sdk)
7.Select 1st driver out of list of drivers shown.
And hopefully, it will work.