Try this:
Run the command "SFC /PURGECACHE" to scan all protected system files and replace
incorrect versions with correct Microsoft versions.
Then use regsvr32 to reregister all of the base DHCP dlls.
regsvr32 Dhcpcsvc.dll
regsvr32 dhcpssvc.dll
regsvr32 mdhcp.dll
regsvr32 dhcpmon.dll
regsvr32 dhcpsapi.dll
regsvr32 ICMP.dll
Thank you,
Mike Johnston
Microsoft Network Support
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