Nv4_disp.dll is a file used by Nvidia Graphics Card Drivers to help them render many of the important graphics & settings that your system needs to use each day. Although Nvidia are normally very good with their software & driver updates, in February 2010, they released an update which caused many computers to enter into an infinite loop, leading to the blue screen of death. The error shown will normally implicate Nv4_disp.dll as the cause of the error – making it a high priority to repair the file & settings causing the error to show.
The error specifically forms when the Nv4_disp.dll file causes your system to enter into an infinite processing loop. This prevents your PC from being able to process the graphics & drivers your system requires to run, leading it to just show you an error. To ensure that this problem is not a major issue, you need to be sure you can both fix the driver issues on your computer and prevent it from recurring.
The first step to fixing this error is to actually use a patch developed by NVidia forum members. This patch is a small software tool that will edit the various files / settings that are specifically causing the problem and will lead your system to run much smoother again. Although this patch is a third-party development (not an official Nvidia release), it’s been used by several hundred people to quickly repair the worst this issue has to offer. You can download the patch from the NVidia forums. You may also want to try and update the NVidia driver on your PC, either automatically or manually – as NVidia may have repaired the issue with a later release.
You should also use a “registry cleaner” program to scan through your computer and fix any of the problems that it has inside. A registry cleaner is a powerful type of software which scans through your system and repairs any errors that are inside the “registry database”. The registry database is one of the most important parts of your system – storing a huge number of vital settings that Windows requires to use each time it’s running. The only problem is that the registry is continually being damaged and corrupted, preventing your computer from being able to read the files it requires to run. This often causes a multitude of errors, and is a big reason why the Nv4_disp.dll error will form. To ensure there are no registry errors on your PC, it’s recommended you use a registry cleaner program to scan through your system and fix any problems it has.