This problem occurs if all the following conditions are true: This problem occurs because of the architectural behavior of the Windows Sockets API and afd.sys. A typical data flow for sending 64 kilobytes (KB) of data looks similar to the following sequence: By default, for Windows operating systems, the value for this timer is 200 milliseconds (ms). If you make a network trace with a network sniffer such as Microsoft Network Monitor, the TCP server sends a TCP ACK segment to the last TCP segment in a TCP data stream in the delayed acknowledgment timer (also known as the delayed ACK timer). When you run a program that uses the Windows Sockets API, you may experience slow performance when you copy data to a TCP server. The WinHTTP Web Proxy Auto-Discovery Service service depends on the DHCP CLient service which failed to start because of the following error: The dependcy service does not exist or has been marekd for deletion.Īnd that keeps repeating many times in a minute (about 30-40 cycles of it).This article provides workarounds for the issue where slow performance occurs when you copy data to a TCP server by using a Windows Sockets API program.Īpplies to: Windows Server 2012 R2, Windows 10 - all editions Original KB number: 823764 Symptoms The DHCP Client service depends the following service: Afd. Running ipconfig, I notice that my system is using an APIPA-formatted address (.x), indicating that the computer couldn't find a DHCP server. I now look in the Event Viewer and find that the DHCP Client service is not running! It is set to automatic start in Services.msc, but when I try to manually start it, it gives me error 1075 (some dependencies do not exist or are marked for deletion).

I have uninstalled/reinstalled my Broadcom 802.11g Wireless Driver several times. I ran a very thorough check for malware and viruses (took over 24 hours to complete), and still no solutions. After booting and logging in again, I find that many services are not running. After rebooting and waiting for me on the login screen, I gave it a hard shutdown to check on the BIOS settings (for a little side project, in the end I did not save any changes). On July 12th 2012, my computer installed updates.

Windows afd service