Original sentence: In June 2009 Sony made driver support available for downgrading the machine to Microsoft Windows XP.On June 26th, 2009, Sony released the VAIO Signuture Collection P series, which has an Intel Atom Z540 and a 256 GB SSD, retailing at $1999.99.The preinstalled operating system is an either Windows Vista Home Premium 32-bit, or Windows Vista Business 32-bit, dependent on model
Edited sentence: It comes preinstalled with Windows Vista Basic, Windows Vista Home Premium 32-bit, or Windows Vista Business 32-bit, dependent on model.On June 26th, 2009, Sony released the VAIO Signuture Collection P series, which has an Intel Atom Z540 and a 256 GB SSD, but is expensive at $1999.99