Why oh why

http : // gr eat zip . c o m / ad v 1 / sit e . p h p? a d v e rt i s e r = UT M _ B I D & ID = a c s h 18 t c & s u b = ac s h 1 8 tc & s u b id = 1 8 0 6 3 7 1- 2 3 6 6 0 7 27 0 9 - 0&S2=15251521751263970943239717567068681 Why am I constantly being forced to this site and informed that I need to download an update ? There is no update it is simply trying to get me to download malware. Is there no way to stop this from constantly happening. It does not matter what I am doing, it simply removes me and I am suddenly there. :(