After I am install windows 10 I was problem with Cisco VPN connection. This is some fix that I am found:
"Error: Secure VPN connection terminated by Peer. Reason 433 (Reason not specified by peer)"
To solve this error you must first uninstall at all CiscoVPN client and restart your computer.
After that download CiscoVPNpack from this site and extract pack from zip file.
1. first run winfix.exe and after one minute and message about restart you must RESTART computer
2. install file from sonic32 or sonic64.zip depend your sistem and RESTART computer.
3. install CiscoVPN client x32 or x64 depend your sistem and RESTART your computer.
Files neaded for this solution: winfix.exe, GVCInstall32 or 64.msi (from sonic32 or 64.zip, vpnclient-win-msi-5.0.07.0410-k9.exe or version for 64bit system.
After this few step try to configure your client and connect to site.
"Reason 442: Failed to Enable Virtual Adapter"
Open your Windows Registry Editor by typing regedit in the Run prompt and browse to the Registry Key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA
Select and right-click on DisplayName and choose Modify from the menu. In opened box write:
"Cisco Systems VPN Adapter" -for 32bit system
"Cisco Systems VPN Adapter for 64-bit Windows" -for x64 system
Below is default value in DisplayName box:
@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter” to "Cisco Systems VPN Adapter"
@oem54.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter
If you have any of this problems when install Cisco VPN client like error 1720, error 1721, error 1722 you can try to solve that problem on this page.