My current HP Pavilion dv6835nr laptop (bought in 2008) is running Windows Vista Home Premium and I bought the upgrade for Windows 7 Professional. I did the Windows compatibility and I can install the 32-bit Windows 7 (currently I'm running 32-bit Vista SP-2). My question is can I just upgrade or do I need to do a custom install? I've been researching it and haven't found anything specific on this topic. Thanks!