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#11
Uninstall the display driver if you have confirmed it is incorrect, in Control Panel>Programs and Device Manager including its software.
Then enable Automatically deliver drivers via Windows Update (Step 3) to Check for Updates, install all Important and Optional except Bing.
Are any drivers delivered?
If not then after Updates are installed and you check for more, once all are installed go to the Dell Support Downloads webpage for your tag number to see if they have loaded the driver for your display model there.
If no driver is provided yet, then try the one for your card here: AMD Radeonā