Selling a PC can be intimidating at first. The biggest concern is data. It's not enough to just delete and erase some files because on a PC there are million different places your data is hiding in. So the easiest way is to factory restore it and be safe. For Windows 8 users a factory reset is easier than ever!
The following tutorial is for Windows 8 PCs that have the recovery partition (the Windows 8 back up install) on the computer already. If your PC came with recovery disks you may need to use those to complete the last step of this tutorial.