The problem is most likely caused by additional network protocols that have been added for the Tosibox TAP-Windows Adapter by 3rd party software. This issue has been mitigated in Key SW v2.14.6, and therefore updating the Key software is the recommended action.
If updating to Key SW v2.14.6 does not help, the solution is to disable all unnecessary protocols from Tosibox TAP-Windows Adapter. These protocols include at least:
Open Network ans Sharing Center, select Change adapter settings and go through all Tosibox TAP-Windows adapters:
right-click on the adapter, select Properties and un-tick all unnecessary protocols on this adapter.