What is nv_agp?

The genuine nv_agp.sys file is a software component of NVIDIA nForce AGP Bus Filter by NVIDEA.
Nv_agp.sys is a system driver for the NVIDEA Accelerated Graphics Port bus filter. A driver is a computer program that provides easier communication and better functionality between hardware and software. The NVIDEA Accelerated Graphics Port is an outdated channel for attaching graphics cards to a PC motherboard. It has since been replaced by the PCI Express. The Nvidia Corporation is an American company that manufactures GPUs (graphics processing units). The company is best known for their flagship GPU line of products called, 'GeForce'. It was founded in 1993 by Jen-Hsun Huang, Chris Malachowsky, and Curtis Priem. Currently, it is one the largest companies in the computer industry and rakes in an annual $4.1 billion. NVIDEA is headquartered in Santa Clara, California, USA.

nv_agp stands for NVIDIA nForce Accelerated Graphics Port Filter

Nv_agp.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if nv_agp.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for nv_agp drivers in need of updating

Nv_agp.sys file information

The process known as NVIDIA nForce AGP Filter or NVIDIA nForce AGP Bus Filter or NForce NT AGP Filter belongs to software NVIDIA nForce AGP Bus Filter or Microsoft Windows Operating System or NVIDIA nForce AGP Filter by NVIDIA ( or Microsoft (

Description: Nv_agp.sys is not essential for Windows and will often cause problems. Nv_agp.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 21,120 bytes (57% of all occurrences), 21,760 bytes or 18,688 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The service has no detailed description. Nv_agp.sys is not a Windows system file. Nv_agp.sys is a Microsoft signed file. nv_agp.sys appears to be a compressed file. Therefore the technical security rating is 14% dangerous, however you should also read the user reviews.

Recommended: Identify nv_agp.sys related errors

Important: Some malware disguises itself as nv_agp.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the nv_agp.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

a driver that can cause constant reboots
system file for NVIDIA nForce AGP Filter for computer graphics. Not good if you're trying to upgrade from XP home to XP Pro.
It causes my video driver to get stuck in threads and causes a reboot
  Cheryl Morgan Young  
Searching NVIDIA for nv_agp.sys finds...nothing!
Deleting it made my graphics card nonexistant. Don't delete it, move it first and see if it breaks your graphics card.
  Helpful Fairy  
Nach etlichen Totalabst├╝rzen mit Win 7 64 habe ich den Treiber umbenannt in nv_agp.old. Seither keine Probleme mehr.
  Chr. Ramseyer  

Rating chart

Summary: Average user rating of nv_agp.sys: based on 8 votes with 6 user comments. 2 users think nv_agp.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users suspect danger.

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Best practices for resolving nv_agp issues

A clean and tidy computer is the key requirement for avoiding problems with nv_agp. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the nv_agp.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

nv_agp.sys [all]