Not that update errors ever happen, but MS has a new troubleshooting and fixing tool for borked updates, providing the update hasn't rendered the OS unusable... "This guided walk-through provides steps to fix problems when installing updates. Here are some commonly seen error codes: 0x80073712, 0x800705B4, 0x80004005, 0x8024402F, 0x80070002, 0x80070643, 0x80070003, 0x8024200B, 0x80070422, 0x80070020. These steps should help with all errors and not just the ones listed." - MS
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