How to do a minimal installation of Windows 7

Here’s are some useful tips I come across when I was reinstalling windows on my portable computer. So, the only drive on my laptop is an SSD which has an staggering capacity of 120GB.

First of all we would like to shave off those features we never ever going to use of the installation. How many times in the last few years have you used the Ease of Access features or do you really need a crap load of drivers for 56k modems just in case you felt like using one? No, me neither.

Here’s the solution:


The software takes a ISO or a physical copy as input, extract it, modify it and then put together a new ISO. It can even create a bootable USB drive for you.

One other thing I noticed is that windows updates takes an awful lot of space. When you update your system through windows update, it saves the installation files for them aswell. Which will hog that precious disk space. RT7Lite solves this by letting you include windows updates in the installation. But then how do we get the updates? Well, Microsoft keeps a easy to get catalog which they call Microsoft Update Catalog. The problem is that we need all the updates that has been release since Service Pack 1. Lucky for us, there’s another tool that can do just that for us.

Windows Updates Downloader

This tool will let you choose which updates you want to download from the catalog and then get them for you.


But the tool need something called a .ulz file which is basically a file which tells the program what to download. I don’t know where I got it so I’m just going to give it to you here

When I did this I ran into a problem: rt7lite wouldn’t start when after I had created my iso. It turns out it uses windows built in disk mounting solution as it’s working directory. The solution was running these two commands in CMD

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dism /unmount-wim /mountdir:%temp%\rt_mount /discard

dism /unmount-wim /mountdir:%temp%\rt_mount_boot /discard