How to Reinstall Windows 7 – A Quick Guide

Illustration: Gordon McAlpin

Often, an operating system will become corrupted, slow or unstable over time. Sometimes, the best thing to do is to reinstall the OS completely. Here’s a quick guide to help you reinstall Windows 7. Have your Product Key handy. It’ll often be written on your PC’s case, or be included inside the box that Windows 7 came in.

All your important documents should be backed up using an appropriate method. While Windows tries to save your old operating system in the Windows.Old folder, it doesn’t always succeed. Plus, you may not have the space to save an entire backup and may only want to back up critical files.

    • Put the Windows disc in the drive

Put your Windows 7 disc in the drive, but close the window that pops up. We’re going to boot from it instead.

    • Restart the PC and boot from CD

Hit Control-Alt-Del and choose to restart. If the PC is frozen, turn it off and back on. Before the Windows logo appears again, hit DEL or F2 to enter the BIOS (depending on your PC). Under Advanced Boot Options, choose the CD or DVD drive as the first boot option. Save and quit. Your PC will boot from the Windows disc.

    • Click Install Windows, then Install Now. Select the check box under Get Important Updates for Installation. That way, Windows will be patched as you go, and you’ll be sure and have the latest version.
    • Select I Accept the License Terms and click Next.
    • Under What Kind of Installation Do I Want?, click Custom.
    • Under Where Do You Want to Install Windows, click the drive where you had Windows before. Usually, C:. Click Next.
    • If you have the space on your drive, choose to save your old Windows installation into the Windows.old folder. Otherwise, you’ve safely backed up your important files already, so leave it unchecked and click Next.
    • Follow the simple instructions from there, including entering the Product Key that I mentioned earlier.

After you reinstall Windows 7 , you can restore your important files from your backup. You may need to install licensed applications again, such as Microsoft Office. Also, be sure and run Windows Update until your copy of Windows 7 is fully updated. You should experience fewer errors with a fresh install. Good luck!

  • Paul Szabados

    How can I do this “Reinstall Windows 7 when my Computer never came with a C/D.
    It was already installed in it when i bought It?

  • Ray Jones, (Australia.)

    I bought MS OFFICE 2010.

    When will the designers fix this software by designers to create a simple method of

    1. Setting a Title on each page of a document

    2. Create an incremental Page Number for each page of a document.

    The current Office method of doing Titles and Page Numbers in a document was ill-designed by a group who had as their remit to come up with the most difficult and impossible method on the planet.

    Suggest to those designers that they look up the method Open Office uses. MS might get some useful ideas for progress.

    Has anyone cracked a simple method for achieving the above for MS Office 2010? PLEASE HELP?

    Ray Jones.

  • Hi Paul,
    In order to reinstall Windows 7 without the disc, you’re going to need to download an .ISO of Windows, which is another name for a disc image, and then burn it to a blank CD, DVD or thumbdrive. Find the links for whichever version of Windows you have on this page, and also a link to the Windows 7 USB/DVD Download Tool. Reboot your PC and enter the BIOS to change your boot order, and boot from the disc or thumbdrive. Enter your existing Product Key (should be on a label on the side of your PC) to reinstall Windows. Reply back with any questions you have.


  • Hi Ray,
    The best way to insert a page number and title in Office 2010:

    • Click the Insert tab
    • Click Page Number
    • Select Top of Page
    • Click Header
    • Click Edit Header
    • Click the Insert tab
    • Click Field…
    • Select the title of the document

    To be sure this content isn’t on the first page of the document, click the Design tab and make sure Different First Page is selected.

    Good luck!

  • pepa

    Dobry den mohly by ste mi poradít ,když zapnu boot menu tak mi nejde klavesnice poradte prosim diky

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