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Should I remove Nortel VPN Client Vista?

What percent of users and experts removed it?
3% remove it97% keep it
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How common is it?
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Nortel VPN Client Vista


Nortel VPN Client Vista is a software program developed by Viessmann IT Service GmbH. The setup package generally installs about 13 files and is usually about 6.4 MB (6,712,683 bytes). Relative to the overall usage of those who have this installed, most are running it on Windows Vista (SP2). While about 83% of users of Nortel VPN Client Vista come from the United States, it is also popular in Germany.

Program detailsProgram details

URL: www.Viessmann.com
Installation folder: C:\Program Files\Nortel Networks\
Uninstaller: "C:\Program Files\Nortel Networks\unins000.exe"
Estimated size: 6.4 MB

Program filesFiles installed by Nortel VPN Client Vista

  • CertAl.dll (by Nortel Networks NA) - Nortel Networks VPN Contivity Client (Nortel Networks Contivity VPN Client certificate support.)
  • certalrc.dll (by Nortel Networks NA)
  • cvclaunchdll.dll - Nortel Networks Contivity VPN Client (Contivity VPN Client; Windows DLL)
  • Extranet.exe - Contivity VPN Client
  • isakmpdrc.dll
  • isakmpMsg.dll - ISAKMP notify messages; message Dll.
  • PWMsgMsg.dll - Nortel Networks Contivity VPN Client; message Dll.
  • NvcRpcSvr.exe - Nortel Contivity VPN Client (Provides support for Nortel IPSec VPN tunnel.)
  • eac607d.exe (by Nortel) - Contivity VPN Client
  • certicom.dll
  • nocnt2k.dll
  • NvcRpcSvrHlp.dll
  • unins000.exe - Setup/Uninstall

How do I remove Nortel VPN Client Vista?

You can uninstall Nortel VPN Client Vista 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 Nortel VPN Client Vista, 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 Nortel VPN Client Vista.

Uninstall it 3%
Keep it 97%
Windows Vista (SP2)
United States

Distribution by countryGeography

83.33% of installs come from the United States
Which countries install it?
  United States 83.33%
  Germany 16.67%


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