There are two options to choose from during the Windows 7 installation process:
Upgrade. This option replaces your current version of Windows with Windows 7, and keeps your files, settings, and programs in place on your computer.
Custom. This option replaces your current version of Windows with Windows 7, but doesn't preserve your files, settings, and programs. It's sometimes referred to as a clean installation for that reason.
To save time and help avoid problems during installation:
Find your product key. You can find your product key on your computer or on the installation disc holder inside the Windows package—or in a confirmation e‑mail if you purchased and downloaded Windows 7 online. A product key sticker looks similar to this:
PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
Go to the Microsoft website to see examples of product key stickers.
Write down your computer name. If your computer is currently connected to a network, you might need you computer name after Windows 7 installation is complete. For more information, see Find your computer name.
Back up your files. You can back up files to an external hard disk, a DVD or CD, or a network folder. We recommend using Windows Easy Transfer to back up your files and settings. For more information, go to the Windows Easy Transfer webpage.
Download and run the free Windows 7 Upgrade Advisor. It will help find any potential compatibility issues with your computer's hardware, devices, or programs that might affect installing Windows 7. For more information, go to theWindows 7 Upgrade Advisor webpage.
Decide whether to install the 32-bit or 64-bit version of Windows 7. The Windows 7 installation disc package includes both 32-bit and 64-bit versions of Windows 7. If you download Windows 7 from the Microsoft Store, you'll need to choose either a 32-bit version or 64-bit version to download. For help deciding which version to install, see32-bit and 64-bit Windows: frequently asked questions.
Update your antivirus program, run it, and then turn it off. After you install Windows, remember to turn your antivirus program back on, or install new antivirus software that works with Windows 7.
Connect to the Internet. Make sure your Internet connection is working so that you can get the latest installation updates, such as security updates and driver updates that can help with installation. If you don't have an Internet connection, you can still install Windows 7.
To format your hard disk during Windows 7 installation, you'll need to start, or boot, your computer using the Windows 7 installation disk which was supplied with your PC .
Turn on your computer so that Windows starts normally, insert the Windows 7 installation disk, and then shut down your computer.
Restart your computer.
Press any key when prompted, and then follow the instructions that appear.
On the Install Windows page, enter your language and other preferences, and then click Next.
If the Install Windows page doesn't appear, and you're not asked to press any key, you might need to change some system settings. To learn how to do this, see Start your computer from a Windows 7 installation disc or USB flash drive.
On the Please read the license terms page, if you accept the license terms, click I accept the license terms, and then click Next.
On the Which type of installation do you want? page, click Custom.
On the Where do you want to install Windows? page, click Drive options (advanced).
Click the partition that you want to change, click the formatting option you want to perform, and then follow the instructions.
When you've finished formatting, click Next.
Follow the instructions to finish installing Windows 7, which include naming your computer and setting up an initial user account.
You might need to start, or boot, your computer using the Windows 7 installation disc or a USB flash drive if you want to:
Install or reinstall Windows 7. For detailed instructions on installing Windows 7, see Installing and reinstalling Windows 7. For information about downloading Windows 7, and then creating a USB flash drive to install Windows 7, go to Installing Windows 7 on a netbook on the Windows website.
Recover Windows 7 from a serious error. If your computer won't start Windows at all, you can access Startup Repair and other tools in the System Recovery Options menu from the Windows 7 installation disc or USB flash drive. These tools can help you get Windows 7 running again. For more information, see Startup Repair: frequently asked questions and What are the system recovery options in Windows 7?
Turn on your computer, insert the Windows 7 installation disc or USB flash drive, and then turn off your computer.
Restart your computer.
Press any key when prompted to do so, and then follow any instructions that appear.
When the Install Windows page appears, click Install now to begin the installation process or click Repair your computer to access system recovery options.
Follow the instructions.
Further Information on how to reinstall Windows 7 Can be found on the Microsoft Website
You can perform a clean installation of Windows 8.1 or Windows 8 using installation media, such as a DVD or USB flash drive. You don't need a previous version of Windows installed on your PC to perform a clean installation of Windows 8.1, but you do for Windows 8. If your PC doesn't have a version of Windows already installed, you'll need install a previous version of Windows or buy Windows 8.1 or a System Builder version of Windows 8 at a local retailer if it's available in your country or region.
If you bought Windows 8.1 or Windows 8 on DVD from a participating retailer, or created a DVD or bootable USB flash drive when you downloaded Windows using Upgrade Assistant, follow these steps to perform a clean installation.
Turn on your PC so that Windows starts normally, insert the DVD or USB flash drive, and then shut down your PC.
Restart your PC, and then press any key to boot from the DVD or USB flash drive.
If you restart your PC and your current version of Windows starts, you might have to open a boot menu or change the boot order in your PC's BIOS or UEFI settings so that your PC boots from the media. To open a boot menu or change the boot order, you'll typically need to press a combination of keys (such as F2, F12, Delete, Esc, etc.) immediately after you turn on your PC. For instructions on changing the boot order for your PC, check the documentation that came with your PC or go to the manufacturer's website.
If your current version of Windows still starts, try again by waiting until Windows asks you to sign in, shutdown completely, and then restart your PC again.
On the Install Windows page, enter your language and other preferences, and then tap or click Next.
Tap or click Install Windows.
On the Enter the product key to activate Windows page, enter your product key.
The product key should be on the box that the Windows 8.1 DVD came in, or in a purchase confirmation email. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX.
On the Please read the license terms page, if you accept the license terms, tap or click I accept the license terms, and then tap or click Next.
On the Which type of installation do you want? page, tap or click Custom.
On the Where do you want to install Windows? page, do one of the following:
In Windows 8.1, tap or click the partition that you want, tap or click the formatting option you want to perform if needed, and then follow the instructions.
In Windows 8, tap or click Drive options (advanced), tap or click the partition that you want to change, tap or click the formatting option you want to perform if needed, and then follow the instructions.
When you've finished formatting, tap or click Next.
Follow the instructions to finish installing Windows.
FOR OUR FULL RANGE OF PC COMPONENTS & ACCESSORIES PLEASE VISIT OUR NEW DEDICATED WEBSITE www.CUSTOMPCPARTS.ie
OUR PC COMPONENT WEBSITE OFFERS 5 TIMES MORE COMPONENTS WITH BETTER NAVIGATION & BETTER PRICES
OVER THE COMING MONTHS WE WILL BE REMOVING COMPONENTS FROM www.CUSTOMPC.ie TO CONCENTRATE ON OFFERING MORE CUSTOM PCS & LAPTOPS