Great computer, very fast & can handle anything I throw at it. This i7 machine replaced an AMD Phenom II x4 810 (that finally died after 6 years of daily abuse...lol), & I was shocked at the difference performance-wise between the 2 pc's...I use this computer for my internet routine, but I also use it as a home-recording daw. On my old AMD, I would have to do everything possible to conserve CPU, but this Dell i7 absolutely smokes the AMD. My music projects would sometimes jack the CPU up to 50-60% (lots of audio tracks, vst plug-ins, & cpu/ram heavy vsti's), but on this pc, those same projects run around 5-6%, which is astonishing to me. Very quiet too, as noise can be an issue when recording...I use Windows 7 Pro (which came installed), & have no intentions of going to Windows 8 or 10. A Windows 8 recovery disc came with this pc, so I made my own recovery disc of Windows 7...This was basically the pc I wanted when I bought the AMD, & I'd always wondered what the difference in performance would be, but now I know. There's really no comparison, the Dell i7-based pc smokes the old AMD (of course), & I'm very, very happy with this computer...Highly recommended!!!