Try to run AMD/ATI Pixel Clock Patcher, you can download from
HEREThat card might have a modded bios, let us know if thats helped with error 43
I guess it doesn't have a modded bios:

Does it?
Run pixel clock patcher may help. I received error code 43 everytime I mod my card. Run pixel clock patcher then restart your rig and it'll work
Do you mean to run atikmdag patcher 1.4.6?
Should I run it to my graphics cards?
Please look at the link picture above.
What is your problem

Download atikmdag patcher 1.4.6, run the program and hit YES button ( si in your case ) !!!!
atikmdag patcher not going to tell you if your card have a modded bios or not !!!
Its going to fix your driver issue , error code 43, if you bios is modded !!!
Simple and easy !!!
You're absolutely right. I just want to add that after installing the patch for the driver, the situation may happen again after I updated Windows. I always disable automatic updates Windows but sometimes critical updates bypass my bans. Forced update Windows 10 is the biggest problem for me.