Permission/Administrator/Trusted Installer??????

Ok I just had to completely wipe my hard drive and reset everything to factory settings. Well now when I try to delete a file it tells me I don't have permission that it has to be done by a "trusted installer," now I am set up as an Administrator (it's only my laptop) and when I right click on the file and go to properties to edit the security tab, it won't let me! Before the reset there was nothing about a "Trusted Installer" and I just had it set to Administrator and was always able to go to the security tab to fix the setting and delete any unwanted files.

Anyone know how to get rid of the trusted installer so I can actually delete files I want to lol?

Thanks!