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.