I bought my 3490CT on eBay UK back in January this year. It was a second hand model which came without an OS. I know that it comes with a license for Microsoft Windows 2000. I used Windows XP Home on mine. From the moment I turned it on I have loved this little machine. It has great features. I have found it to have just the adequate speed for portable computing needs. I do still find the need to have a main fast desktop computer at home. This in my case is because I do a lot of work in HTML and Flash. If you do not require a extremely fast machine which you will use for very basic Windows tasks and a machine which looks good, is tiny and light this should be one of the contenders in your buying list. You can get this very competitively priced on eBay. It is one of Toshiba's older but very stable machines. The processor being a Pentium III is sufficient for many operating systems. I have used a few on my machine: Windows 98 & XP + Linux. This computer will be able to run Windows XP at quite an impressive speed. However the older the OS the faster it will run because of the size. The RAM is not too bad it is fine for people who will not run several programs at once. The HDD is a fair size. This is understandable to keep the overall size of the machine down. You can get an interchangeable CD-RW Drive for this machine or simply could use some form of external hard disk or flash memory drive. I think this machine looks better than most new machines. It is far smaller than many new machines that I have seen in regional stores. Overall a good buy for someone who requires a first computer or a basic machine to run normal task on.