can't ditch the shield w/ avast gone

i am always logged in as admin, i tried using iobit uninstallers. i can’t try the avasclear.exe because i can’t get in safe mode, f8 won’t do anything on the toshiba a205-7464. this is a brand new 1TB hd i just installed last week.

the avast program itself is gone but i can’t ditch the shield. it prevents me from executing a file even offline and w/o the avast. i see that there is a folder in C:/programs/avast software that has a bunch of folders. i can’t delete that either, even as admin. i’m sure some files in that folder are preventing me from opening a file. what can i do to get rid of every last file of avast off my HD? i’m on windows 7, please advise ASAP.

thanks.

Did you use aswclear? You will be prompted to reboot into safe mode automatically, do so.