well i turned on my comp and it said ive been infected with Spyware. i have spybot search and destroy but that shit didnt work. so this "spy sheriff" shit pops up and scans my comp and shows my the spyware and shit. but it says i gotta buy the program in order to remove the spyware. first off, is spy sheriff legit? second, if i were to buy that program would it be safe to buy it since my comp has spyware. third, any suggestions on what i should do?