Q: Boot Camp drivers for MacBookAir6,2?

I've already done the /Applications/Utilities side and downloading it that way takes forever (I don't know why) and requires a thumb drive which I don't have on me at this cafe but there is a fast wi-fi connection here.  I have a partition with Windows 7 installed since 2013.  I also installed Parallels on the Mac side to access the Boot Camp partition.  Something has gone wrong (Parallels installs its own drivers but I'm not sure that are suitable for booting into Windows directly, probably only for running in virtual mode from Mac, I don't know) and the F1, F2, etc keys won't work so I'd like to reinstall (or uninstall and reinstall) the Boot Camp software drivers for Windows on the Windows side but I don't know which version to download.  I may have already downloaded it as I have many BootCamp****.zips on my NAS but between my Mac Mini 2014, my MacBook Pro 2011 and this Mac Book Air 2013, I don't know which BootCamp*****.zip applies to which Mac anymore.  There must be a document that says which of these applies to the 2013 MacBook Air (MacBookAir6,2) or if there's a updated zip I should download.

That's great!   I have 5.1.5640 installed!

Windows update reports error 80070103 when trying to update the Intel HD Graphics 5000 driver.

But I'm running Windows 7 not 10.  I missed this week's deadline to upgrade to 10 for free, my 100 GB boot camp partition didn't have the 20 GB free space required for the upgrade, as it was full of gigantic CBS.log files.  I guess the minimum partition size for Windows is around 160 GB.