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hi,  my system is restarting in regular bases so i checked the system logs info and just before

every restart i see this error log :

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Details

Product: Windows Operating System

ID: 1002

Source: Dhcp

Version: 5.0

Symbolic Name: EVENT_NACK_LEASE

Message: The IP address lease %1 for the Network Card with network address %2 has been denied by the DHCP server %3 (The DHCP Server sent a DHCPNACK message). 

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well i understand what the help center said, but i don't see that they say anything about restarting... i remember seeing that error log before but don't remember that the PC was

restarting..  can anyone show me a link to all this and could it be stooped? thank u

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This could be caused by some things:

Your DHCP server has no addresses free for lease...

Your ip lease has expired, and cannot be renewed.

Check you dhcp server.

(if you have a router, just reset it, would do the trick..)

Or you have a static IP address assigned to your computer, which is not in the DHCP scope of the DHCP server.

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the error is indeed caused after a restart, but also after a boot.

when some things cannot be set because they get overruled by hard coded addresses (like the dns address you entered)

This causes the error because the DHCP-handshake cannot be completed.

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