I had the worst update ever this time. The first time, I lost my wireless connectivity completely. Nothing I tried could get it back. Uninstalling the driver was no go, once it was gone, I couldn't get it back. The system lost the files. Even using a USB Ethernet dongle (which worked) I couldn't get the driver from Microsoft.
So, reset the SurfaceRT, started the update process again. But I noticed that it the 1/15/14 firmware was needed, again (the start button for wakeup fix). For some reason my SurfaceRT keeps saying it needs that update after every reset, along with the normal files, got through and noticed that again, the start button wakeup still wasn't working right.
Another reset.
Again, the firmware was showing that it was required. WTF!?!?!? So this time, I unselected all the updates except for the firmware. After it installed, I did another reset, FINALLY windows update said the firmware wasn't required, and I noticed that the wake with windows button works proper.
Finally onto the normal updates. This time I also decided to just do updates as defaulted (without going into the control panel and re-selecting all). It took a bit, and multiple reboots and rechecks. Eventually selecting the "important" (which aren't checked by default). Slowly going through those (the actual update installs went really quick), I think I finally the cleanest update possible, and things are really good. Everything seems faster than it ever has been.