Bootcamp Windows 7 installed but no wifi capability or USB drive?
Tuxera is an app that makes NTFS filesystems fully readable &amp; writable. There is a 15-Day trial for it. So you can download Windows Support, and just put it into for example your C:\Users\User\Desktop instead of putting it on a USB. 

If you cannot find the BOOTCAMP partition on your Desktop. Press Command+Alt+G and type /Volumes/ and there search for your Windows partition. And then you just drag &amp; drop the Windows Support file to your Windows Desktop.