How to replace my existing os (windows xp) with windows vista?

im using windows xp but recently having problems due to some files and programs are missing or coppupt, im trying to replace it with windows vista but cannot install. cannot copy files that are missing or corrupt. what should i do? pls help. thanks a lot. How to replace my existing os (windows xp) with windows vista?
you can always upgrade by paying up on the microsoft site and getting a new cd..however vista is really bad and I wont advice you to go for itHow to replace my existing os (windows xp) with windows vista?
Assess Hardware Requirements:



* Windows Vista Premium Ready PC's include at least 1GB system RAM and 128 MB graphics memory.



* To help further optimize the Windows Vista experience, Dell recommends Premium Ready PCs be configured with 2 GB dual-channel (2-DIMMs) system RAM, a Dual-Core processor, a 7200 rpm Hard Drive and at least a 256 MB discrete graphics card.



Before you upgrade to Windows Vista , you should consider backing up your most important files or saving them to a safe location. Windows Vista庐 will still have access to these files after installation, but in the event there is data loss you may not have a backup.



Typical backup options include:



* Using Windows Backup or other third party backup software

* Writing data to a CD or DVD

* Copying data to an external hard drive

* Copying data to a network folder on another computer



Windows Vista expects that you have a previous version of Microsoft Windows installed on your computer. Windows Vista supports two Windows installations for upgrading:



* Windows XP with Service Pack 2 (SP2)

* Windows VistaTM (other Windows Vista Editions)



Once you've decided to upgrade to Windows Vista, you may want to reference this information throughout the installation process.



In addition, make sure you have your Windows XP installation CD available in case the installaction process is not successful. You may need to uninstall Windows Vista and you'll need this CD to restore your system along with your backup data method.



Here are several steps on how to re-install Windows XP:

1. Insert the Windows XP CD into the CD/DVD drive. Power on the computer.

2. Setup will start copying files, which depending on your system can take a while.

3. Next you will get the option to Repair or enter Setup. Choose to enter Setup.

4. Setup will scan for previous Windows installations.

5. After several confirmation screens and you choose the location of your installation, Setup will show a progress box and reboot

when copying files is complete.

6. From this point, you will follow the on screen prompts.

7. Logon to XP and apply Service Pack and Critical updates from Windows Update before installing any software or hardware.

8. Install your anti-virus software.

9. Install all other applications.
You need to re-install XP you do NOT need Vista because that version of Windows is designed for the new DUAL PROCESSOR CPU's, so the version of XP is OPTIMUM for YOUR computer.



Besides that... the people who HAVE Vista installed aren't all that happy with it and the people who have tried to replace XP with it are even LESS happy with the change
If you are not able to install Windows Vista after your system is booted then you can boot your system with the Windows Vista CD itself and install the Vista OS.
vista is garbage and will slow down your machine big time.
tell microsoft to give you a new cd