And the second one never put on the web:
Intel® Core™ i5-3450 CPU @ 3.10 GHz 3.10GHz
Mémoire 16.0 Go ram
Système d’exploitation 64 bits
Windows 7 Familiale Premium
This sounds like it is a similar to a Lenovo X230, which is the only PC which the Qubes website names as a Qubes Certified hardware, although it has some other changes, like installing Core Boot.
Reasons for that are on the Qubes site. https://www.qubes-os.org/doc/certified-hardware/
Lenovo X230 runs more slowly than one would like. Then again, it makes use of a PC that you are not, apparently using. It is a good place to get ones feet wet. Likely fewer install issues.