You can get some better advice if you provide a bit of information. (Right click on My Computer and select Properties):Desktop or laptop?Brand, model, and model numberGHz or MHz of processor speedMB of memoryMB of hard drive capacityAfter a bit of cleanup, I suspect you could sell your computer through Craig's List or your newspaper classifieds for $50 to $150. Some things you could do to increase its value:Add memoryWipe the hard drive and reinstall Windows 98 from the diskBuy Windows XP used (but not pirated), wipe the drive, and install thatWipe the drive and install some cute and small version of Linux (Puppy, for example)Add a network card if it doesn't already have an ethernet port, and offer to buy the customer a (cheap used) DSL or cable modemIf you do not know how to do these, don't worry. You can get help quite easily. What your computer can handle depends on the specifications, though. Windows XP or xUbuntu Linux might run a bit slow, and Vista would almost certainly be a mess. You old computer could make very happy some child or low-income person who just wants to surf the net and write letters. Of course, you may decide you like playing around with the computer so much that you want to keep it.