I using lenovo windows 7 ?? I like this product very much and working smoothly long time without any maintenance charges which have 2 GB RAM and 32 bit Operating systems which give us better operating preference I have just one problem in this pc that was battery ?? which dead after 10 months using and now no batter support available right now I am using this ?? with the help of ups. I loved the flat display and digital camera which provide us vedio calling features and give us the facilities to live recording and vedio calling features I always sujust to people to use that produces.