[sos help!!!] installation leo4all v3
 

HI,
I have an ACER aspire x3900
i3-nvidia g315-4gb ram-500gb -windows 7 x64

when i tried to install Leo4all v3 ,after i press F8 and i wrote -v ,the installation didn't star and pc always restarted.
WHAT CAN I DO FOR INSTALL LEO4ALL??
sorry for my englush and thank you :D