Browser failing to open in test case

Help! I am having trouble with my test cases. It is always failing because chrome doesn’t open.
i am using KS 6.3.2 and my chrome is Version 76.0.3809.100 (Official Build) (64-bit)
Windows 8.1 Pro.
i also tried Firefox but to no avail.
i have even set automatically update webdriver.
do i actually have to use chrome V74 before it works?