diff --git a/assets/setting-up-dev-machine/windows_apt_install_npm_error_fix_missing.png b/assets/setting-up-dev-machine/windows_apt_install_npm_error_fix_missing.png
new file mode 100644
index 0000000..ec0ee2e
Binary files /dev/null and b/assets/setting-up-dev-machine/windows_apt_install_npm_error_fix_missing.png differ
diff --git a/resources/windows_apt-get install npm_fix-missing.rtf b/resources/windows_apt-get install npm_fix-missing.rtf
new file mode 100644
index 0000000..0cf8f5b
--- /dev/null
+++ b/resources/windows_apt-get install npm_fix-missing.rtf	
@@ -0,0 +1,49 @@
+{\rtf1\ansi\ansicpg1252\cocoartf2761
+\cocoatextscaling0\cocoaplatform0{\fonttbl\f0\fnil\fcharset0 CascadiaMono-Regular;\f1\fnil\fcharset0 CascadiaMono-Regular_Bold;}
+{\colortbl;\red255\green255\blue255;\red0\green0\blue0;\red252\green50\blue33;}
+{\*\expandedcolortbl;;\csgray\c0;\cssrgb\c100000\c29522\c16523;}
+\paperw11900\paperh16840\margl1440\margr1440\vieww15780\viewh14440\viewkind0
+\pard\tx560\tx1120\tx1680\tx2240\tx2800\tx3360\tx3920\tx4480\tx5040\tx5600\tx6160\tx6720\li304\fi4\ri-3254\pardirnatural\partightenfactor0
+
+\f0\fs24 \cf2 \CocoaLigature0 \
+Err:2 http://ports.ubuntu.com/ubuntu-ports noble-updates/main arm64 linux-libc-dev arm64 6.8.0-48.48\
+  404  Not Found [IP: 2620:2d:4000:1::19 80]\
+Fetched 84.9 MB in 10s (8262 kB/s)                                             \
+
+\f1\b \cf3 E: 
+\f0\b0 \cf2 Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/l/linux/linux-libc-dev_6.8.0-48.48_arm64.deb  404  Not Found [IP: 2620:2d:4000:1::19 80]\
+
+\f1\b \cf3 E: 
+\f0\b0 \cf2 Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?\
+\
+root@m3410-w11:~# apt-get update\
+\
+Hit:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease\
+Get:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease [126 kB]\
+Get:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease [126 kB\
+\
+Get:29 http://ports.ubuntu.com/ubuntu-ports noble-security/restricted arm64 Components [212 B]\
+Get:30 http://ports.ubuntu.com/ubuntu-ports noble-security/multiverse arm64 Components [212 B]\
+Fetched 5155 kB in 2s (2114 kB/s)                          \
+Reading package lists... Done\
+\
+root@m3410-w11:~# apt-get update --fix-missing\
+\
+Hit:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease\
+Hit:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease\
+Hit:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease\
+Hit:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease\
+Reading package lists... Done\
+\
+root@m3410-w11:~# apt install npm\
+\
+Reading package lists... Done\
+Building dependency tree... Done\
+Reading state information... Done\
+The following additional packages will be installed:\
+  build-essential bzip2 cpp cpp-13 cpp-13-aarch64-linux-gnu cpp-aarch64-linux-gnu dpkg-dev eslint fakeroot g++ g++-13\
+\
+\
+\
+\
+}
\ No newline at end of file
diff --git a/setting-up-dev-machine.md b/setting-up-dev-machine.md
index 4b3b6c0..9e769f0 100644
--- a/setting-up-dev-machine.md
+++ b/setting-up-dev-machine.md
@@ -9,7 +9,12 @@ On any host, _dotpi_ requires:
 
 ## Linux
 
-In addition to the common requirements, be sure that the following packages are installed:
+Install the common requirements:
+
+- `npm`
+- `rpi-imager`
+
+Install also the following packages:
 
 - `git`
 - `make`
@@ -47,15 +52,30 @@ Be sure to install `Node.js` _within_ `WSL`.
 ```
 PS C:\Windows\system32> wsl
 Launching Ubuntu...
-root@m3410-w11:~# apt install node
+root@m3410-w11:~# apt install npm
 ```
 
-Do _not_ install the `Raspberry Pi Imager` in WSL.
+If you get errors, read the messages.
+
+![windows-apt-get-error-fix-missing](./assets/setting-up-dev-machine/windows_apt_install_npm_error_fix_missing.png)
+
+Then, try to solve the problems (within `WSL`).
+
+```
+root@m3410-w11:~# apt-get update
+root@m3410-w11:~# apt-get update --fix-missing
+```
+
+Finally, install `npm` again (still within `WSL`).
+
+```
+root@m3410-w11:~# apt install npm
+```
 
-In this first guide we will see how to use the `dotpi-install` tools to setup a Raspberry Pi, and how to monitor and control it remotely using the `dotpi-manager`
+`Raspberry Pi Imager` is an exception: Do _not_ install it within `WSL`. (Later, do _not_ run it within `WSL`.)
 
 ::: info
-For windows, run _any_ commands within `WSL`.
+For windows, run _any_ shell command within `WSL`.
 :::
 
 ## Installing `dotpi-tools`
@@ -67,5 +87,5 @@ npm install -g @dotpi/tools
 Now, the command `dotpi-tools`should be available in your machine.
 
 ::: tip
-If you prefer to use `npx` rather tha installing the package globally, just replace `dotpi-tools` by `npx @dotpi/tools` in the remaining of these tutorials.
+If you prefer to use `npx` rather than installing the package globally, just replace `dotpi-tools` by `npx @dotpi/tools` in the remaining of these tutorials.
 :::