Package did not download

[AZGrove]

I'm trying to update the drivers in my W541 using the Lenovo System Update software. I downloaded the two critical updates (Intel WLAN Driver for 7260, Realtek HD Audio Driver), but at the time I had to pause the install as I wasn't able to reboot my computer at the time. I tried to install them later, but every time I attempt to either download and install, or select download only, I get an error saying the package did not download.

Is there any way to force download these again and install, or maybe download them manually? There don't seem to be many options from the System Update interface.