The local computer store I use is Novatech, and they sell laptops and PCs with or without an operating system installed. You could buy a bare laptop and load your own OS. I'd also recommend a solid state drive, I have used Samsung 840 series SSD in two home PC and they are on a cash back deal this month at approved suppliers including Novatech.With cash back my 250GB cost me £115 inc vat. Transforms how my PC boots and runs, worth every penny.