How can I reinstall my operating system?
There are several options here, depending on whether you have a complete PC or your own compilation. If you have an installation CD / DVD, insert it and boot from the CD / DVD. Further instructions for reinstallation can be obtained from the manufacturers of the operating systems. If you do not have an installation CD / DVD, try recovering from the recovery partition. For further instructions, refer to your manuals or contact the manufacturer of your system Windows 8 / Windows 10.