The latest and official SM-J450 drivers are available on this page. So if you are looking for it, this page will help you out.
There are 2 drivers that are compatible with the SM-J450 device, you will find the download links below.
First: SM-J450 ADB Driver (official)
This drive is powered by Android, you will need to install it if you try to transfer data between PC and SM-J450.
Second: SM-J450 MediaTek Driver (official)
This driver manages connecting the SM-J450 with the PC for installing firmware file (stockROM)
You will need to install SM-J450 (MTK) Drivers if you are trying to use MediaTek Flash Tools i.e (SP Flash Tool, MTK Flash Tool, SP MDT Tool, and the SN Write Tool).
How to Install SM-J450 USB Driver.
1- After You Download SM-J450 USB Drivers, Extract the archive file.
2- Run the setup file and click OK.
3- Then, click next and next.
4- Finally, click Finish Button.
5- Now, Connect your SM-J450 to PC.