CCDciel

With Windows 10 or 11 64bit you can also install the Windows subsystem for Linux. This let you use a more recent version of astrometry.net, the same as with Ubuntu or another available distribution.

But this require a 64 bits build of CCDciel because the Linux environment cannot be initialized from a 32 bits program.
If you want to try the instruction below you have to install the 64bit version of CCDciel first.
You must be sure all your ASCOM drivers work with a 64bit application.

Follow the instructions to activate the Windows subsystem for Linux on your computer and install the Ubuntu variant.

After the installation is complete, open the Ubuntu window to execute the following Linux commands:

First you need to update the list of packages:

sudo apt update

Then upgrade the libraries to the latest version:

sudo apt upgrade

Finally install astrometry.net:

sudo apt install astrometry.net

Download the index files depending on your image scale, for example down to 16 arc minutes you need the indexes 06, 07, 08-19.

sudo apt install astrometry-data-2mass-06 astrometry-data-2mass-07
sudo apt install astrometry-data-2mass-08-19

Alternatively you can also use the index that are already installed on the Windows system by editing the configuration file:

sudo nano /etc/astrometry.cfg

For example to use the index installed by Astrotortilla in C:\cygwin\usr\share\astrometry\data add a row:

add_path /mnt/c/cygwin/usr/share/astrometry/data

You must let the Cygwin path blank in the astrometry preferences so CCDciel use the wsl.exe command to run the solver.