Nokia MTK drivers Problem.

Hi sir,
With all respect and from core of heart...........I have this problem always...I can not do always new windows every week. Please i need a permanent solution. Nokia Mtk phones when do new windows it work for few days and after that same...... In manager it show drivers with Yellow tringle. Give bath goes normal but can not flash drivers always disapper after some seconds.

Have tried all methods tlod in videos and so on. but always problem. Please need it permanent solution. Please Please....... I am using windows 7 64 bit.

1. Make sure device is powered off. Power off, if need. Wait 10 seconds after
2. Insert USB cable in phone
Waiting for device connection ...

PTFN : MediaTek PreLoader USB VCOM Port (COM12)
MODE : NOKIA USB SERIAL
PORT : 12
Error : Failed to open port!

Error : Fail to init protocol!
Remove battery, cable. Check cable and connection. Repeat operation!

Reconnect Power/Cable!

If any body can help.Please most well come.

Thanks
Br, Raja