I’m running a trial version (I’m assuming/My computer crashed and I can’t find the Vista CD that supposedly came with my PC but the one CD that I did have that Circuit City gave me was this F’n version of Windows Business) Anywho, am I able to buy 7 home premium (upgrade) instead of Windows home premium? I just don’t want to spend $100 and have it not function on my PC.

this one: http://www.amazon.com/gp/product/B002DHLUWK/ref=s9_simi_gw_p65_i2?pf_rd_m=ATVPDKIKX0DERpf_rd_s=center-2pf_rd_r=1WVZPMAFH6ZHPXDKQD4Cpf_rd_t=101pf_rd_p=470938631pf_rd_i=507846 ? Instead of this one: http://www.amazon.com/gp/product/B002DHGMK0/ref=s9_simi_gw_p65_i1?pf_rd_m=ATVPDKIKX0DERpf_rd_s=center-2pf_rd_r=1WVZPMAFH6ZHPXDKQD4Cpf_rd_t=101pf_rd_p=470938631pf_rd_i=507846 ?