acer aspire x1920 pc tower +

Hi there I have a acer aspire x1920 pc tower windows 7 home premium 64 bit intel pentium processor e6700 intel GMA X4500 graphics up to 1696MB 1TB hard drive 4GB DDR3 memory dvd super multi drive multi in 1 media card reader 350 or swap for decent montain bike no time wasters please as I need a bike to get me to work