Adding instructions for Windows 10 Ent version.
Slipstream of particular version can be done only using the same version of Windows. Say Windows 8.1 for Slip Streaming Windows 8.1 and so this applies to Windows 10 as well.
dism /Mount-Wim /WimFile:c:\iso\ms-iso\sources\install.wim /index:1 /MountDir:c:\iso\ms-mount
dism /Image:c:\iso\ms-mount /Add-Driver /Driver:c:\iso\virtio-iso\Balloon\w8.1\amd64 /recurse
dism /Image:c:\iso\ms-mount /Add-Driver /Driver:c:\iso\virtio-iso\NetKVM\w8.1\amd64 /recurse
dism /Image:c:\iso\ms-mount /Add-Driver /Driver:c:\iso\virtio-iso\pvpanic\w8.1\amd64 /recurse