Ok I Dont Know If This Is The Right Form Or Not So If Not Please Forgive Me

I Realy Need Help. I Am Running Windows Me And Up Till Last Week Everything Was Fine But Now When Ever I Try To DownLoad Something It Want Let Me. It Comes Up And Says
That Their Is A Restriction Blocking It To See Administrated Of My PC And I Know I Didnt Put It On Their. If Can Anyone Help Me Out Plz