IP address conflict

tatest wrote:

Among fixes, restart router often works, everybody has to ask for a new address, but sometimes that's just everybody awake. Some clients can figure out what is happening when they wake up, others are not so smart.

Is this occurring using the same router? It's not unusual to see IP conflicts using DHCP, though not necessarily common. I would also power down the router, and let is sit for awhile before powering back up. Otherwise, your router firmware may be corrupt?

I also have a DELL XPS Ultrabook, and would check to make sure it is not effected by the just disclosed multiple DELL self signed root certificate vulnerabilities: DSDTestProvider. Though believe an IP conflict is more related to the router itself.

I would just assign a static IP to the XPS as mentioned.