USB Driver USB Driver Software 
If you are having problems with your computer and bitcoin or Ethereum mining then this is a common problem with the AMD cards. You can see here how to uninstall an AMD driver and install a different driver as has been listed on this website. You will not the most common error when using XMR Stak mining tool.
You most common errors are going to be:
- xmr stak invalid result
- amd invalid result gpu id 0
- invalid job id xmr stak
- amd invalid result vega 56
- xmr stak bad shares
- xmr stak cryptonight v7
- xmr-stak amd invalid result gpu id
The problem is a problem that started in early 2018 and this is because of the way AMD designed the newer drivers in their 18.XXX driver range. You will need to uninstall the driver you have with DDU as explained above on the link and then download the AMD blockchain driver to stop the errors from occurring.
How to fix the xmr stak invalid result
- Restart your computer into safe mode;
- Use DDU to uninstall your current driver;
- Reboot your computer;
- Install the AMD Blockchain Drivers
- Reboot your computer;
- Switch to compute mode;
- Start mining again without errors.
This simple solution will fix the xmr stak invalid result for most users.
