Some are informational and once in a while you encounter some user that will not accept that. Using your example I can replicate that easily by connecting with wifi. The DHCP message should occur in the event viewer and the machine works anyway.
I don't have a good answer for fretting folk.
This keeps coming up in the Event Viewer. Basically it states: Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 000874BAF9F6. The following error occurred: The semaphore timeout period has expired. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
The computer seems to be working fine, so maybe this is an "non-issue", but then again maybe this is a warning that something is going out. A quick Google search seemed to suggest that I should do a command prompt for ipconfig /all. The suggestion was that the "lease expires" should be set to "forever", meaning ten or twenty years down the road. Mine appears to be set to expire every 12 hours. Don't know if I should go there, or leave it alone, and for that matter I don't even know how to change it.
Windows XP pro, SP3, Zone Alarm Firewall, Microsoft Security Essentials, all updates
Appreciate any suggestions,