HOW TO INTSALL MTK & SPREADTRUM DRIVERS ON WINDOWS 8,8.1 & 10

1. On your Keyboard click (WINDOWS BUTTON)

2. Type General

3. Then click on Settings

4. And General will appear

5. Then, go to General, and scroll to the bottom of the page, click Restart Now button under Advanced Startup section.

Note :- In Windows 8.1 and Up, the Advanced Startup option has moved to Update and 
 recovery section under Recovery.

6. The computer reboots to a startup menu, in which click Troubleshoot and click Advanced Options at next screen, Choose Startup Settings next, and click Restart button. The computer reboots and prompts another menu to choose. One of the items is to Disable driver signature enforcement. Press number 7 or F7 to continue booting to Windows 8 with digital sign enforcement disabled.

7. Now you have disabled Driver Signature Verification for the current boot, now you can Install any driver including VCOM Drivers,.just follow the below guide from the below link for installing the VCOM Drivers, on all windows