When I received the unit the onboard LAN hardware did not function and the power supply kept cutting out. Also the installed software was XP Pro SP 1 (and not SP2 which was issued back in 2004). Called the refurbisher (Joy Systems) and was advised that the unit needed to be returned. I then called Overstock who agreed to rush me a replacement unit ..Replacement unit arrived within 48 hours (drop shipped from Joy Systems who, in their haste, sent me a unit without a COA sticker from Microsoft and without an installation CD or any instructions or other wrtten material.) When I could not boot into Windows I again called Joy who acknowledged that I should have been sent the a COA, installion CD and written instructions and that there was nothing I could do with the unit they sent me. By this time I had lost patience and told Joy that I had given up on them. I then contacted Overstock who arranged for the return of the second unit and promised a full credit. Accordingly I have no idea as to the performance of the unit . Overstock's performance was fine. Joy's was a joke - a very bad one Also note that the optical drive is DVD-ROMonly with no ability to write.data. The case is very tight and the location of the HDD is such that a second hard drive cannot be accommodated on the same cable as the installed HDD. While a second HDD could be installed on the same IDE cable as the optical drive, this would preclude adding an second optical drive which writes CDs ( This is probably academic since the 240 watt power supply would probably preclude adding both another HDD and optical drive