Yes, after running it and seeing a "problem fixed" message I got my hopes up.
However when I tried to update again, the message on windows update still is:
"There were problems installing some updates, but we'll try again later. If you keep seeing this and want to search the web or contact support for information, this may help:
• Definition Update for Windows Defender - KB2267602 (Definition 1.213.5125.0) - Error 0x80070643"