Hello dear people,
i have a pretty new Thinkpad E480 with an AMD RX550 and tried Fortnite today. I got a completely choppy experience on the lowest settings and was wondering what was wrong. So i checked my Device Manager and it had a yellow warning sign next to the AMD driver (so i'm guessing the thinkpad used the onboard grafic for the game, hence the bad experience)
when i right click the driver it says Error Code 43 (Device has been stopped, because an error occured)
I tried to install the newest driver from various sources (Lenovo, AMD, DriverBooster, Windows itsel). None of them gave me an error while installing, except for windows which gave me the same Code 43, but afterwards the code 43 was still there.
While installing those drivers i also used amd clean uninstall to get rid of the old one beforehand
When trying to access the radeon setting it tells me that I should try again after connecting a AMD GPU
I saw another thread here with a simliar issue who said he fixed it by "just flashing the rx 560 to the original gpu bios" but i have no idea what that means to be honest.
I am not a huge techie, and i really want this new thinkpad to work the way it should 
Thanks in advance for any help
Other specs: Windows 10 64 Bit
Intel Core i5-8250U
16GB Ram
PS: all the error messages were translated from german, so they might be worded a bit differently than usual
Thanks for the reply,
I tried both, Lenovo and AMD. Also tried everything that link had to offer.
So when I try it with the installer from the AMD site, I get a seemingly successful installation and afterwards this:
this is when i try to access the settings from the AMD Logo in the bottom right of the desktop (which would appear if i click on the expand arrow next to the battery sign)
I think if I rightclick on the desktop it should offer me AMD settings next to the Intel settings, also not happening
and yeah this is the code 43 window.
When I use the Lenovo installer it also tells me that the installation was successful (it's using a different installtion client though), but I don't get the AMD icon on the bottomt right of the desktop, neither does the driver appear in the device manager.
If anyone has an idea and needs additional info I am happy to oblige.
Thanks everybody for helping out
edit: I also updated the BIOS to 1.19, because it was already on 1.18 anyway. In the end it can't reduce the GPU performance when it's not working at all 
It's not working with that driver either.
These are the Hardware infos if that is of any interest. "Nicht verfügbar" means "not available"
And yes it's still under warranty, maybe a month old now. But I need the laptop at least a few weeks more for university stuff and would really like to not have to setup the whole system to my liking again. (I do music stuff which is a pain to setup properly)
Thanks again for your help 
I made this simple installation procedure to help prevent the AMD Drivers from being corrupted or installed wrong. If you are installing the AMD drivers without properly deleting the previous drivers. It may cause the problems you are having. You haven't mentioned how you uninstalled and reinstalled your AMD drivers. So here is my instruction on how to do it.
Try using these instructions, more or less to eliminate, previous AMD Drivers causing issues with the newly installed driver.
install AMD driver :
1) Download the correct AMD Full Set of drivers from AMD Support. Make sure your Windows is fully updated via Windows Update. Windows MUST be fully updated because the latest AMD Drivers requires all the latest "Optional" and "Recommended" Updates to be installed.
2) Use Windows Uninstall to uninstall current AMD driver and software. Then use DDU (Display Driver Uninstaller) Display Driver Uninstaller (DDU) V17.0.9.0 Released. - Wagnardsoft Forum in safe mode to eliminate all traces of the current AMD driver and software from your computer.
Delete C:\AMD folder from the Root Directory. Reboot.
3) Go to Device Manager and click on "Display Adapter" and make sure you are on the MS Basic Display Adapter. If not, uninstall the AMD driver using Properties.
4) Try reinstalling the AMD FULL SET OF DRIVERS that you manually downloaded. Make sure to disable the Internet to prevent Windows Update from installing a newer version. Also configure Windows to prevent it from updating Drivers via Windows Update. Also it has been mentioned to disable any Anti-virus programs before installation of AMD Drivers.
5) If the new AMD drivers installs and works correctly, delete again the C:\AMD folder from the Root directory. To save space on the HDD.
6)Enable both the internet and Anti-Virus program (if applicable).
7) Go back to Device Manager and check to be sure your GPU card driver is working and identified correctly.
Be sure to follow kingfish Link on how to install AMD Drivers with an Intel CPU/APU in Laptops from the previous comments.
One more important procedure to do. Run SFC /scannow in a "elevated" Command Prompt. This is just to check and make sure all your Windows Core Files are not corrupted or missing. It should come back after a few minutes saying "No integrity Found" or something similar.
This is a software issue by the sounds of it. At least your dGPU card is being recognized by Windows. This is a good thing. Hopefully, if you follow the above instructions IT MAY fix the problem. If not, I would suggest opening a Lenovo Support Ticket.
By The Way,
Your English is outstanding. English must be a second language for you. Makes it easier to communicate accurately.
Good Luck.
I try to help as much as I can until I reach a point that I have no more suggestions. I am close to that point now
I think i followed everything correctly step by step, but unfortunately it's still not working.
I have found one more potential clue:
So the panel on the left says that the device PCI..... needs further installations. The msinfo tells me that it is the PNP Device Detection (again translated). Could this point to any other error source? I didn't find any drivers that seemed to be connected to that on the lenovo page.
Again thank you very much
