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Should I remove PureNZB?

What percent of users and experts removed it?
8% remove it92% keep it
Overall Sentiment
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How common is it?
Reach 0.0014%



PureNZB is a program developed by Z51 L.L.C. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The main program executable is par2.exe. The software installer includes 19 files and is usually about 52.7 MB (55,254,996 bytes). WebUpdate.exe is the automatic update component of the software designed to download and apply new updates should new versions be released. In comparison to the total number of users, most PCs are running the OS Windows 7 (SP1) as well as Windows 10. While about 55% of users of PureNZB come from France, it is also popular in the United States and Switzerland.

Program detailsProgram details

URL: www.z51.biz
Installation folder: C:\Program Files\z51\purenzb
Uninstaller: C:\Program Files\Z51\PureNZB\uninst.exe
Estimated size: 52.7 MB

Program filesFiles installed by PureNZB

Program executable:par2.exe
Path:C:\Program Files\z51\purenzb\par2.exe
Additional files:
  • PureNZBWin.exe - PureNZBWin (PureNZB)
  • PureNZBLib.dll - PureNZBLib
  • PAR2.dll - PAR2
  • GongShell.dll (by Gong Solutions) - GongShell (Gong Solutions Shell Library)
  • GoogleSearchAPI.Net20.dll (by iron9light) - Google Search API (Google Search API .NET 2.0)
  • ICSharpCode.SharpZipLib.dll (by ICSharpCode.net) - #ZipLibrary (SharpZipLib for .NET Framework 2.0)
  • MiniHttpd.dll (by Rei Miyasaka) - MiniHttpd HTTP Server Library
  • Newtonsoft.Json.Net20.dll (by Newtonsoft) - Newtonsoft Json.NET (Newtonsoft Json.NET .NET 2.0)
  • par2threaded.exe
  • ProgressODoom.dll - ProgressODoom
  • QuickPar.exe (by Peter B Clements) - QuickPar
  • SharedObjects.dll - SharedObjects
  • uninst.exe
  • UnRAR.exe (by Alexander Roshal) - WinRAR (Command line RAR)
  • wapz51v2.dll
  • WebUpdate.exe
  • WebUpdateClient.exe
  • XPTable.dll - XPTable

Program behaviorsBehaviors exhibited

Scheduled Task
  • QuickPar.exe is scheduled as a task with the class '{0749916D-3748-4A1B-ABB6-480E27C1AD91}' (runs on registration).

How do I remove PureNZB?

You can uninstall PureNZB from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program PureNZB, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove PureNZB.

Win 7 (SP1) 63%
Win XP 4%
Uninstall it 8%
Keep it 92%
United States

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 62.96%
Windows 10 33.33%
Windows XP 3.70%
Which OS releases does it run on?
Windows 7 Home Premium 25.93%
Windows 7 Professional 25.93%
Windows 7 Ultimate 11.11%
Windows 8.1 Pro 11.11%
Windows 10 Pro 7.41%
Microsoft Windows XP 3.70%

Distribution by countryGeography

54.55% of installs come from France
Which countries install it?
  France 54.55%
  United States 39.39%
  Switzerland 3.03%
  Netherlands 3.03%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 29.41%
ASUS 23.53%
Acer 23.53%
American Megatrends 5.88%
Medion 5.88%
Dell 5.88%
Common models
Notebook W230ST ... 5.56%
Micro-Star MS-7360 5.56%
MEDIONPC MS-7667 5.56%
HP-Pavilion WC963AA-ABF p... 5.56%
HP-Pavilion VS201AA-ABF H... 5.56%
HP Pro 3130 Microtower PC 5.56%


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