Create a form using the wizard..it will take you through effortlessly and tell it you only want to look at specific software (i.e certain records) for one or many computers. Have you created the relationships correctly? one to one, one to many or many to many? Otherwise the links or queries will not work properly and the database will not function correctly.
You can write a query for the required data, again using the wizard or basic SQL commands.
There are several other ways but the above are the easiest.