apparently a known issue. had no network after some windows updates on a windows 2003 VM
in the eventvwr:
The IPSec driver has entered Block mode. IPSec will discard all inbound and outbound TCP/IP network traffic that is not permitted by boot-time IPSec Policy exemptions.
The IPSEC Services service terminated with the following error:
The system cannot find the file specified.
- check if there are any entries in HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local
- if so, delete that subkey
- then run regsvr32 polstore.dll
- restart the ipsec service
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