I'm looking for a notebook for around 500 euro with a good price-performance ratio that I can pay in installments.
My problem is that I don't know which notebook Office has.
Word and PowerPoint are important to me and that I have Office for an unlimited period without additional payments.
Do you have any tips on how to find out, or preferably a link that meets my criteria?
Very easily. If the description says Office is installed, Office is on it. Otherwise not. This is an additional service to win customers and is therefore always advertised.
By default, Windows does not have Office on it.
Office365 is software as service, even if it is pre-installed and belongs to the laptop, it is only a digital license for one year.
You can still buy Office, but that should cost you about as much as the laptop itself.
Alternatively, just use OpenOffice or LibreOffice, which is open source and the scope is similar, apart from Excel with VBA, but that's not available for MacOS either and nobody has complained so far.
