How about uploading a RWEverything report. You have given us NO info to help you troubleshoot. My burger doesnt taste good...what did I do wrong??? Get it?? Get RWEverything, do a acpi dump and slic dump and upload it...we can get it figured out.. EDIT>>>I am going to say the article you cited it crap...
Install your version of Windows 7 that you chose. BEFORE your REBOOT then use slmgr.vbs to insert the correct License. then use slmgr.vbs and insert the corrct KEY for the License. then REBOOT. ON ACERs the Certificate must match the KEY or vis versa...other wise your SOL. 5 Acers - AOA110(1) - AOA 150(2) - AO751h(1) - Acer Extensa (1). 100% activation using proper Cert + Key. Finding a 2.1 Slic for my Acers has been 100% FAILURE.