System AdminOutlook Express Error : 0x800CCC15 SOCKET CONNECT ERROR – Unable to open Windows socket February 8, 2009March 3, 2021 - by Shaunak Sontakke Remove the TCP/IP protocol and reinstall it. In windows, go into Network from the Control Panel. NOTE: You may need your Windows CD for this task! Share this:Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on WhatsApp (Opens in new window)