hey guys , i have a problem..when i've installed this antivirus in my pc(with windows xp ps2)my computer die!!!!! is not a problem with velocity,but my computer becomes Freezzzzzeeee!!!!!! and i can´t use anymore...the only way to repair it,is deleting my hard disk and install xp again!!!!why this happen?

???thanks aaa(when i'm installing comodo, appears something like"error:blablabla...you must update your operating system" or something like that..
ps:my apologies for my english,i'm from chile!!!Well, in spanish...:
cuando instalo comodo antivirus en mi pc., se congela y no puedo arreglarlo, y la unica forma es formateando e instalando xp
