Forum Thread: Hi Guys. Could Someone Help Me? I Can't Reinstall Old Programs Since I've Upgraded to Windows 8.1 on My Computer

I've searched for the reason and i've remembered that i've changed my account name after the upgrade. how could i delete my old reg values because it seems to be that values who are the reason of my difficulty. i've seen that i have 4 user on my computer, but i know that there are only two user in fact