Download the two self-extracting archives by right-clicking on the relevant link and choosing Save As.
In the examples below it is assumed that you have downloaded the archives to a folder on the C: drive of your computer called "Downloads".
Unzip the first of the self-extracting archives (as_a2_chemistry_v1.1_part1.exe) by double clicking on it and responding as in the diagrams shown below.
Unzip the second of the self-extracting archives (as_a2_chemistry_v1.1_part2.exe) by double clicking on it and responding as in the diagrams shown below. Please note that after this archive has finished self-extracting it will try to open the page "C:\chemistry_revision\index.html" using your default browser. If you do not want this to happen, uncheck the box labbelled "When done unzipping open: C:\chemistry_revision\index.html".
At this point, your default browser should automatically open the page shown below. If it does not, jump ahead to the section entitled "Accessing the Revision Quizzes" below.
By default, the main index page for accessing the revision quizzes is located at C:\revision_quizzes\index.html. You should be able to open this file by