What is nopdb.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the nopdb.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Nopdb.exe file information

Windows Task Manager with nopdb
Nopdb.exe process in Windows Task Manager

The process known as NOPDB belongs to software Norton Speed Disk (version 7.0 for, 6.0 for, 6.0 for Windows NT, 7.0 for Windows NT, 7.0 for Windows) or Norton SystemWorks or Outerinfo by Symantec (

Description: Nopdb.exe is not essential for the Windows OS and causes relatively few problems. The file nopdb.exe is located in a subfolder of "C:\Program Files" (e.g. C:\Program Files\NORTON~1\Speed Disk\). Known file sizes on Windows 10/8/7/XP are 172,065 bytes (38% of all occurrences), 176,193 bytes and 4 more variants. 
The program is not visible. It is not a Windows system file. Therefore the technical security rating is 33% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to uninstall Norton Speed Disk 7.0 for or Norton Utilities from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify nopdb.exe related errors

Important: Some malware camouflages itself as nopdb.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the nopdb.exe 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

Leanna: It's called "SpeedDisk" because it de-fragments your hard drive, though the process itself is CPU-intensive. Schedule it to run when you're not using the computer (i.e. overnight).
nopdb.exe background-monitors fragmentation
It's a CPU hog, but you're using it for a reason... if you want your drive defragged, you need to not use other programs while it runs. It being a CPU hog means less chance of that, therefore win-win!
Major CPU hog. Uninstall Speed Disk and get Diskeeper; it's faster and more transparent.
I do not own and have never installed Norton System Works 2003 onto my PC, i have this file sitting in my computer and while it runs, i get adware popups like crazy, when i close this process, the popups go away. Beware as Malware could try to use this name for its dirty deeds !
If running when not wanted, just enter Norton and stop it. Set your defragmentation schedules to match your needs.
Net info says it's Norton. I don't have norton. System was d r a g i n g. Delted NOPDB.exe using TaskManager and BINGO my PC is responsive again! Whopie! Yea! Sorry got carried away.
Here's the rundown for the less technically inclined - Norton Speed Disk will eat CPU and make your system slow down WHEN it's running, but when it finishes the defrag, your system will run considerably faster than if you hadn't run it. If it's annoying you, here's the solution - in the Norton Speed Disk interface, click View Global Options... Set Priority slider to Low, set Memory slider to Low, click Apply, then click OK. It will take more time to defrag this way, but it will be considerably less annoying. Running on Win 2K, and it's the best defrag utility I know.
  Kurt :-)  
More comments can be found here:
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Rating chart

Summary: Average user rating of nopdb.exe: based on 90 votes with 9 reviews. 53 users think nopdb.exe is essential for Windows or an installed application. 7 users think it's probably harmless. 12 users think it's neither essential nor dangerous. 8 users suspect danger. 10 users think nopdb.exe is dangerous and recommend removing it. 9 users don't grade nopdb.exe ("not sure about it").

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Best practices for resolving nopdb issues

A clean and tidy computer is the key requirement for avoiding problems with nopdb. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the nopdb.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

nopdb.exe [all]