How to Stop Nv4

Disabling the Display Driver
1. Click the 'Start' button in Windows and select 'Run.' Type 'devmgmt.msc' (no quotes) in the Run window and click 'OK' to launch the Device Manager.
2. Expand the 'Display adapters' section in the Device Manager by clicking the plug sign next to it.
3. Find the 'NVIDIA Compatible Windows 2000 Display driver' entry under the 'Display adapters' heading. Right-click this driver and select 'Disable' from the choices that pop up. This will completely disable the driver, and since this is the only utility that uses nv4_disp.dll, the file will go unused but remain on the hard drive.
Removing the .dll
4. Right-click on the 'Start' button in Windows and select 'Explore' to open Windows Explorer. In the left panel, navigate to the system folder for your version of Windows. If you're using a 32-bit version of XP or Vista, this is C:\Windows\System32. In 64-bit versions of XP or Vista, it's C:\Windows\SysWOW64. In 2000 and NT, it's C:\WINNT\System32. In 95, 98 and ME, it's C:\Windows\System.
5. Left-click on the system folder in the left panel to display all of its contents in the right panel. Browse through the files in the right panel until you find nv4_disp.dll, then right-click on the file and select 'Delete' from the pop-up options. This moves the file to the Recycle Bin.
6. Left-click the 'Start' button in Windows and click 'Run.' In the Run window, type 'cmd' and then click the 'Run' button. This will open the command prompt.
7. Type 'regsvr32 /u C:\Windows\System32\nv4_disp.dll' in the command prompt, but modify this line if necessary to specify the right file path for your version of Windows. In this example, the file path for 32-bit versions of XP and Vista is used. If you're using a different version, refer to the system folder file paths listed in the first step and substitute the path for your Windows version in this line. Once you've typed in this command, press 'Enter' to un-register the .dll from your system.