How to Install Windows Vista on Windows XP PC?

Windows Vista is amongst the Windows operating system, and is successor of Windows XP. It consists of many new and exciting features, which will increase your daily performance.
Features
Windows Vista consists of Ease of Access Center, which offers a suitable, centralized place to find out accessibility settings and programs, so that, you can use your computer easily. It offers you instant access to common tools, ability to explore all accessibility settings in seven categories, etc. This operating system consists of BitLocker Drive Encryption, which prevents an unauthorized person who runs a software hacking tool from breaking Windows Vista file and system protections.
Usability
Windows Vista is integrated with accessibility settings and programs, which make it easier for you to view, hear, and use your computer. These programs are particularly helpful for those people, who have visual difficulties, hearing loss, pain in their hands or arms, or reasoning and cognitive issues. You can easily perform upgrade to Windows Vista on a Windows XP-based computer with the following steps:
STEP 1: Insert the Windows Vista DVD into the DVD drive.
STEP 2: Click on “Install now” on the Install Windows page.
STEP 3: On the Get important updates, click on ““Go online to get the latest updates for installation”, in order to protect your computer against security threats.
STEP 4: On the “Type your product key for activation page”, type your 25-character product key.
STEP 5: On the “Please read the license terms” page, click on “I accept the license terms” check box.
STEP 6: Click on Upgrade on the “Which type of installation do you want?” page.
STEP 7: Follow the instructions to complete installation of Windows Vista.
It is suggested that you should restart your computer after Windows Vista installation gets completed.
Limitations
While installation of Windows Vista, you can have some issues like installation could not get completed, etc. You may face any problem while working with Windows Mail. Sometimes Windows Media Player will stop responding.

How to Fix Error 0x0000000A or Stop: 0x000000D1

This post provide computer support to troubleshoot or Stop error 0x0000000A or Stop: 0x000000D1 . This error occur when you try to install Windows Vista, you may receive one of the following Stop error messages:

STOP 0x0000000A IRQL_NOT_LESS_OR_EQUAL

STOP 0x000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL

Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.

Troubleshooting
If you receive a "Stop: 0x0000000A" error message or a "Stop: 0x000000D1" error message when you try to upgrade to Windows Vista, follow these steps:

1.Restart the computer.
2.Roll back the installation to the previous operating system.
3.Use the Windows Vista Upgrade Advisor to check for known issues.
4. Disconnect any external hardware devices that are connected to the computer. Additionally, remove or disconnect any hardware that the computer manufacturer does not support. Also, remove any hardware that you recently installed.
5. If you receive either of these error messages during the first phase of the upgrade installation, follow these additional steps:
a. In the previous operating system, update any installed antivirus and antispyware programs, and then scan the computer for problems.
Note If you find any problems, we recommend that you perform a clean installation of Windows Vista.
b. After you scan the computer for viruses and for spyware in the previous operating system, uninstall any antivirus and antispyware software.
c. Contact the computer manufacturer for information about any known Windows Vista compatibility issues and about how to obtain and to install a BIOS update.

6.Try to upgrade to Windows Vista again.