What if the computer can't get an IP address automatically?

Troubleshooting:

Because the author of the company's clients are automatically obtained through the DHCP server IP address, so this message should be the client is not assigned to the IP address. In the "Run" type "cmd", enter the "command Window", enter "ipconfig" carriage return, found that this computer is currently using the IP address is "169.254.0.6", this result confirms the author's previous judgment, because if the client sent a request to the DHCP server four times, Without a response, the system automatically assigns any IP address between 169.254.0.1 to 169.254.255.254 to the current client. So what caused the network to be restricted? The author first unplug this computer's network cable into another computer, you can assign to the IP address, which indicates that the network cable is no problem. Then I suspect is not a DHCP server settings, login server to check the relevant settings, no suspicious place, into the "scope of DHCP" → "address lease", delete this is unable to automatically obtain the IP address of the host record and refresh it again. Then on the problem computer, enter "Ipconfig/release" to release the original IP address, "ipconfig/renew" to retrieve the IP address, but the result is still unresolved. However, after executing the "ipconfig/renew" command, the system prompts the "RPC service is not available" information, does the fault point out here? Quickly into the "control Panel" → "Management Tools" → "services" to find "Remote Procedure call (RPC) Locator", and sure enough the status of this service is "stopped", double-click this service to set the startup type to "Automatic" and click the "Start" button. Then click the above method to obtain the IP address again, but the final problem is not resolved.

Failure resolution:

This I am puzzled, not the network card is broken? At the end of the program that I opened before, when you are ready to switch off the network card, accidentally found that the "DHCP Client" service in the Services Settings window is also in a "stopped" state, from the name, should be related to the DHCP service, so it is enabled, holding a try the mood, re-enter the " Ipconfig/renew "command, did not expect the client to successfully obtain the IP address this time. The fault has finally been ruled out.

Summarize:

Later, in understanding the cause of the fault, I learned that it was because colleagues feel that the system boot faster and slower, so download the Super Rabbit to perform the automatic optimization caused. But I didn't expect the Super bunny. In order to speed up the system, stopped some of the services, leading to the beginning of this article, it appears that we use optimization software should be cautious, so as not to cause unnecessary trouble.