1. Access the BIOS of the computer by pressing the key that appears in the on-screen instructions. Depending on your computer, you can often the BIOS by pressing either the 'Del' or 'F2' key.
2. Once inside the BIOS, set the optical (CD-ROM) drive as the first boot device. Press the 'F10' key to save the changes and exit the BIOS. Insert the Windows operating system disc into the optical drive. Restart the computer. The 'Press any key to boot from CD' message will subsequently appear.

3. Press 'Enter.' Windows will boot into the Setup from the CD. After the Setup has loaded, boot into Recovery Console by pressing the 'R' key. Recovery Console will appear. You will be prompted to choose the type of installation that you want to log onto.
4. Type the number beside the primary Windows installation. Usually this is denoted by a number 1. Press '1' and then press 'Enter.' If you have a password for your computer, you type it after 'Type the administrator password' appears. If not, simply press 'Enter.'
5. At the C:\ prompt, type the following: 'CHKDSK /P' (without quotes). This will check the disk for errors and fix any errors found. Then type 'FIXBOOT' (without quotes) at the C:\ prompt. When the 'Are you sure you want to write a new boot sector?' prompt appears, press 'Enter.'
6. Type 'Exit' (without quotes) at the C:\ prompt. If the drive has been flagged as 'dirty,' a surface scan may be initiated upon reboot. The computer will reboot into Windows. Remember to change the boot order back to the hard drive.