I have a Dell Optiplex 780 running win 10 64-bit.

I have installed a ASUS Radeon HD 5450 EAH5450 64bit 1GB DDR3 PCI-E VGA DVI HDMI Graphics Card, which someone on a Dell forum told me would run just fine on that PC.

It runs but the driver crashes all the time, sometimes every minute. I have downloaded the, presumably, latest driver (Nov. 2015 dated) but it does make no difference. Can someone help to get rid of those crashes?