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I've tried various methods to install Cisco VPN on a Windows 7 64-bit machine. I keep getting the same error:

Error 27850. Unable to manage networking component.

Operating system corruption may be preventing installation.

Awesomely evil. What bothers me is that one of my co-workers, who has an image of my machine, who also saw this problem, ran a particular installer and it worked for him. But it didn't work for me.

I have tried the following Cisco VPN client installers (based on the EXE file names):

  • x64 client
  • x64 5.0.07.0240 - k9 - BETA client
  • Windows 7 client (wasn't compatible with x64)

They all give me the same error (minus the latter, which wouldn't run). I'm also suspecting this may be from a partial uninstall which may not have been properly purged (and lead to restore point corruption). Both of those issues were resolved, but maybe there are some dregs left in my system.

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Any particular reason why you are using an outdated client? –  BroScience Jan 3 '13 at 13:51
    
@BroScience that's what the company wants me to use. I'm no longer at said company, thankfully. –  ashes999 Jan 3 '13 at 15:29
    
For what it's worth 0290 is much more stable than 0240. i would try that after cleanly removing 0240 –  BroScience Jan 3 '13 at 19:09
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2 Answers

I found the solution at https://chapter10.wordpress.com/2012/11/19/error-27850/

You need to change the value of the the registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\MaxNumFilters

Default is 8, maximum is 14.

I got this to work with x64 5.0.07.0440-k9 client.

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I tried this and it didn't work for me. That is a good solution though. –  ashes999 Jan 3 '13 at 15:28
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Step by Step with screenshots to fix this Cisco VPN error.

http://www.itsystemadmin.com/error-27850-unable-to-manage-networking-component/

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explain the info here and avoid using a link –  Sickest Mar 13 at 8:06
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