David from Brooklyn #157 | Tuesday, September 22, 2009 9:42 AM I was getting this error as well after I updated to Snow Leopard. Not sure why. This was on a machine running 10.5.8. To use System Restore (Windows XP, Vista, 7, 8, and 10): Click the Start button. Check This Out
Jay from Mass #100 | Friday, August 22, 2008 7:45 AM Worked instantly. Locate Cisco Vpn Client Error 51-associated program (eg. It worked great for me! Step 7: Run Windows System File Checker ("sfc /scannow") System File Checker is a handy tool included with Windows that allows you scan for and restore corruptions in Windows system files https://supportforums.cisco.com/discussion/10256526/vpn-client-error-51-windows-xp
Thank you so much. Launch VPN client again. Another program maliciously or mistakenly deleted Cisco VPN Client-related files. Received the following error message."Error 51: UNable to communicate with the VPN subsystem.Please make sure that you have at least one network interface that is current active and has an IP
well.. It worked instantly. A program run as part of the setup did not finish as expected. Error 1722: There is a problem with this Windows Installer package.
Adrian Smith from Sydney, NSW, Australia #14 | Wednesday, July 18, 2007 8:22 AM Error 51 has just cropped up for me as well (4.9.01 (0030))... Unable To Communicate With The Vpn Subsystem Windows 8 Thanks. Click on the Cisco VPN Client-associated entry. Please Note: If 51 errors still persist after a clean install of Windows, your Runtime Errors problem MUST be hardware related.
Click the Uninstall/Change on the top menu ribbon. David from Delft/Netherlands #105 | Wednesday, September 10, 2008 3:43 PM Thanks to Tela now this stupid and very annoying problem is fixed. Cisco Vpn Error 51 Windows 10 Tony from VA #72 | Sunday, May 4, 2008 10:13 AM I was losing my mind until I found your fix. It is possible that the name of the .kext changed.
Unlike the Cisco website which made me register and then told me that I couldn't access the page that would explain the error messages. his comment is here Thanks a lot! Cristi from Bucharest, Romania #81 | Thursday, June 12, 2008 3:03 PM Whew, that saved my day, or night so to say. Casey Woods from Calgary, AB #55 | Tuesday, February 19, 2008 12:03 PM Thanks!
Windows runs sluggishly and responds slowly to mouse or keyboard input. Here is the terminal info, and idea'? this is casued by third partry firewall. this contact form Restarting my computer is not something I want to spend my time doing, since I usually put my computer to sleep.
It should work. Thanks! THANK YOU!
Fab 2011/10/24 at 07:22 Thank you so much! Anders from RTP #30 | Thursday, November 22, 2007 7:38 AM Are you using OS X 10.5 Leopard? Kei from Fremont, ca, usa #174 | Saturday, February 20, 2010 2:30 PM Great tip and it worked! Any other thoughts?
Running WinSweeper once per day (using automatic scanning) will ensure that your computer is always clean, running fast, and free of 51 errors related to temporary files. Cisco Support Community Directory Network Infrastructure WAN, Routing and Switching LAN, Switching and Routing Network Management Remote Access Optical Networking Getting Started with LANs IPv6 Integration and Transition EEM Scripting Other Kelly O from Moorestown, NJ #136 | Wednesday, February 11, 2009 10:19 AM I'm using VPN client version 4.9.00 on a Mac OS X 10.5.6 macbook and having the same error51 http://allsoftwarereviews.com/cisco-vpn/cisco-vpn-client-error-440-hp-windows-8.php Enzo from http://tweaklearning.wordpress.com #74 | Wednesday, May 21, 2008 9:08 AM works like a charm..
Likely have to wait for an update from Cisco for the client to work -- means I need to update documentation for our users! A black box will open with a blinking cursor. Because of the time and complexity involved in updating drivers, we highly recommend using a driver update tool such as DriverDoc (Developed by Microsoft Gold Partner) to automate the process. ray haleblian from Vancouver #79 | Saturday, May 31, 2008 7:49 PM thank you for posting this - it actually led me to find this StartupItem was missing, so I was
Daniel Gauthier from Missoula #91 | Tuesday, July 15, 2008 10:09 PM Cisco VPN Error 51: unable to communicate with VPN subsystem My Windows Fix... Harald Walker from Almere / The Netherlands #67 | Sunday, April 6, 2008 5:03 AM Thank you for the post.