When start downloading its start normal and when reach at100% show massege have any virus... I try many side even try to download anti virus all same.

It could be your antivirus/firewall... Try disableing, download it, then enable antivirus/firewall and do virus scan and if u do have any viruses it'll fix it or whatevever

Your system might be having some sort of virus.
So first through a good anti-virus software program (like: MacAfee, Trend Micro, Microsoft Security Essentials)
Run a full scan for your PC.
After that try to download again.