While Windows Vista is a completely new operating system, how you install or re-install is not much different to other versions of the Windows operating system. The most important thing is to make sure you have everything to hand before you actually make a start. You certainly don't want to be having to search around for SATA drivers and things like that just after you have started the installation process.
Another important thing to remember is, if you have USB peripherals attached to your PC, i.e., Printer, Webcam, Card Reader, Modem etc, make sure that you disconnect them from the PC prior to installing the operating system. The only USB peripheral you do not need to remove is USB Mouse and Keyboard.
To install Windows Vista, you should have the following:
1/ Switch on your PC
2/ As the system starts to boot quickly insert the Window
Vista DVD
3/ If
all goes well a black screen should appear with the words ‘Press any key to
boot from CD or DVD’. If you find that the PC boots into Windows XP then you
probably weren’t quick enough inserting the DVD into the DVD drive. Don’t
worry, just let XP load, then click the Start button and select ‘restart’
and go through the procedure again.

5/ Depending upon the available physical memory in your PC you will find that it takes a few minutes to initially load the Windows Vista files into your PCs memory.

6/ After the main files have finished loading a black
screen will appear with a green progress bar

7/ A short time later the progress bar screen will change
to a blue screen like the one above.

8/ When the language Window appears select, using the drop
down menu, the language you need for installation and then press the Next
button

9/ At the Install screen, click the Install Now button to
start the installation of Windows Vista

10/ After clicking the Install Now button, you will be
asked to wait

11/ After a moment or two the product key screen will
appear. At this point type in your Windows Vista product key number and then
click the Next button

12/ The next step is to accept the EULA (End User Licence
Agreement). Just click in the box next to the ‘I accept the license terms’
option and press Next

13/ You are now asked to choose the type of installation
you require. If you are doing a clean install, select Custom. If you are
upgrading from another version of Windows, click Upgrade. You should note
that, if it is not possible for you to upgrade i.e., you are doing a clean
install, the upgrade option will be disabled

14/ Having got through the preliminaries you now need to
select the drive or partition where you want to install Vista. Once you have
selected the drive or partition press the Next button

15/ Windows Vista will now start to install. You can
instantly see the installation progress as files are copied, expanded and
installed.

16/ After the files have been installed your PC will need
to restart. You can either allow Windows Vista to automatically restart your
PC or, alternatively, you can press the Restart Now button on the 'Windows
needs to restart to continue screen.

17/ Your system will now restart

18/ After restarting you will be asked to wait a moment
while Windows prepares to start for the first time

19/ The next screen you should see is a ‘please wait’ screen.

20/ After a short period Windows Vista continues to install the installation files. After it finishes your PC will restart again.
Please Note Currently there is no warning
of this restart, so don’t worry if the screen goes blank and the PC restarts
on its own

21/ After restarting the progress bar appears again before
Windows Vista starts asking for user details

22/ The first user detail screen asks for your name,
password, and picture. Type your user name, followed by your password. You
will also need to confirm your user password. After this has been completed
you may select a picture of your choice. If you don’t want to change the
default picture simply press the Next button. If you want to change the
picture, simply highlight the new picture you want and then press the Next
button

23/ The next screen allows you to choose a name for your
computer and also to change the desktop background. Type the name of your
computer and then click on a suitable background picture (unless you like
the default one) and then press the Next button

24/ On the next screen you have the option of selecting
how you will deal with updates, firewall etc. It is wise to click the ‘use
recommended settings’ option and then press the Next button. You can make
changes to the security settings, if you wish, after installation has
finished

25/ Now review the date and time settings and make any
necessary adjustment. Press Next after completing this screen

26/ Finally the 'Thank You' screen appears. The major part
of the installation has now been completed. All that is required now is for
Windows Vista to check your PCs performance, so to get started, press the
Start button

28/ As performance tests are being carried out a sequence
of around 6 windows like the one above will appear on screen

29/ Each screen gets you nearer to your ultimate aim, the
Windows Vista desktop

30/ The sequence of these screens may repeat depending upon how quickly they appear.

31/ Almost there
32/ Just a little bit longer.


34/ Windows
Vista is now loading

35/ Type in your user password and then press the Arrow
button to the right of the password dialogue box

36/ Welcome To Windows Vista

37/ Windows Vista is now preparing your desktop. This is
the last hurdle

38/ Congratulations you have now arrived at the Windows
Vista desktop!