very simple virus to get rid kaso matrabaho ang steps after to restore your computer. wag ka maniwala agad pag sinabi ng iba na pag virus reformat agad. reformat is only for last resort, as in last na pag natry na lahat ng ibang ways
in this case, i think meron small utility akong nakita dati that can reset the folder permissions in one click only para hindi mo na gawin mano mano isa isa. unfortunately i forgot the name of the utility (nakita ko na ulit, ireset ang name ng utility)
but first things first, get rid of virus file. pag hindi mo kasi natanggal yung file na yun, babalik at babalik lang din yang symptoms na yan