Check the listing for details. HP ProBook 4431s - 320GB Hard Drive - Windows 10 Pro 64-Bit Preloaded. Condition: Used. Listed at 70.77 USD. BID WITH CONFIDENCE!! See Our Feedback!USA Owned & OperatedFast shipping from Central USA Detailed Description This hard drive was made specific to the PC in the title.Drive was loaded with a GENUINE Windows from Microsoft.Hard Drive has been FULLY tested and does not contain ANY bad sectors.WINDOWS 10 KEY IS NEEDED FOR ACTIVATION. IT IS NOT INCLUDED.Windows has been updated all drivers loaded. Works perfectly.Includes: Microsoft Works, Adobe Reader, PowerDVD and Antivirus < Payment Instructions Compatibility is the buyer's responsibility and should be addressed before bidding. If you are unsure if the hard drive is compatible with your system, please email us. Payment is due within 3 days of auction end. Thank you very much for looking. Shipping Details We reserve the right to ship USPS Parcel Post to PR, AK, HI and PO Boxes. Return Policy Please contact us before starting a return. If a computer has a problem booting it is typically the SATA Operation setting in the motherboard's BIOS. It is very easy to change. This is uncommon, but if it does happen, it can be very easily changed in 2 minutes. Just contact us and we will send very easy instructions. Matt 25:40