How to Fix the Nv4

1. Click "Start," "Run" and type "devmgmt.msc" and click "OK." Navigate to "NVIDIA Compatible Windows 2000 Display Driver" and right-click it. Click "Disable" to disable the driver.
2. Right-click the "Start" button and click "Explore." Double-click "Windows Explorer."
3. Locate the Windows folder of your operating system version.
4. Left-click the system folder and navigate to "nv4_disp.dll." Right-click the file and click "Delete."
5. Click "Start" and click "Run." Type "Cmd" and click "Run" to open the command prompt.
6. Type "regsvr32 /u C:\Windows\System32\nv4_disp.dll" into the command prompt and press "Enter." This will un-register the "Nv4_Disp.Dll" from your system.