I have been trying to update Windows 8 to 8.1 with no success. From the Windows store I downloaded Windows 8.1 (a free installation), and near the end of the install (90%) I get the following message:
installation failed--error code 0x80004005.
From the Microsoft forums I concluded I needed updates KB2919355 and KB2919442 in order to install Windows 8.1, but I do not have either of these two updates and don't know where to find them.
Go to this page and this page. Scroll down to "How to obtain and install this update." There should be some direct download links available. Try those.
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