Dell vostro 220
It shows windows is not genuine

I purchage a dell vostro 220 from one shop in tadepalli gudem.

i connected to net, it shows ur windows 7 is not genuine.

r u giving original os bysell?

the shop owner do some ultrations time of i purchase.

later i asked him wy it shows this msg.

he replied we cont get original o s.

is it right?

hw can i handle this and wat can i do inthis case?

plz do me favarable