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To fix: Click Start and type  regedit  in the Search field and hit enter. Navigate to  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA Find the String Value called  DisplayName Right click and select  Modify  from the context menu. In Value data, remove  @oemX.inf,%CVirtA_Desc%; . The Value data should only contain  Cisco Systems VPN Adapter for 64-bit Windows . Click  Ok . Close Registry Editor. Retry your Cisco VPN Client connection. Ref :  https://supertekboy.com/2013/10/19/cisco-vpn-on-windows-8-1-reason-442-failed-to-enable-virtual-adapter/

// Step 1 : Install .....  Had this same error trying to  npm install  after cloning a node based project. It had an npm dependency that required C++ source to be compiled. I had already modified my  VS2017  install to include  Individual Components  ->  VC++ 2017 version 15.7 v14.14 latest v141 tools but that didn't help. I applied these commands in succession npm install -g node-gyp npm install --global --production windows-build-tools The first had no effect but the second did the trick and the  npm install  command completed successfully after that. // Step2 : Delete Path // Step3 : npm install อีกรอบ // Success Ref :  https://stackoverflow.com/questions/43312676/visual-studio-platform-2015-toolset-v141-cannot-be-found/43773913