mere pas dell ka laptop n 5030 hai main us main window seven instal krne k bare main jana chta hn plz help me or main window seven use kr raha hm net se downloadind dreive d ya e main save karta hn magar meri c drive free space kam hota ja raha hai aisa kyn ho raha hai plz help me thanks or aajkal kon sa antivirus acha hai is bare main bi bata dain