Here we have a couple of project computers for the hobbyist or repairist. One is a hp Compaq 6200 Pro and the other is a Lenovo All-In-One Model C540. Both units have RAM, and start up into BIOS Setup. The Lenovo All-in-One needs a power adapter and a Hard Disk Drive. The hp Tower needs a hard disk drive. Of course, you'll need to install Windoze. The hp has a Win 7 Pro COA, which can be used to install Windows 10. Selling as a lot, not interested in selling individually.