Windows Defender, previously known as Windows AntiSpyware, is a free program for Windows user to detect and remove known spyware from your computer. Windows Defender (Beta 2) helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it’s detected, and a new streamlined interface that minimizes interruptions and helps you stay productive. The software uses automatic definition updates provided by Microsoft analysts to help detect and remove new threats as the threats are identified.

Improvements in Windows Defender (Beta 2)
- • Enhanced performance through a new scanning engine.
• Streamlined, simplified user interface and alerts.
• Improved control over programs on your computer using enhanced Software Explorer.
• Multiple language support with globalization and localization features.
• Protection technologies for all users, whether or not they have administrator rights on the computer.
• Support for assistive technology for individuals who have physical or cognitive difficulties, impairments, and disabilities.
• Support for Microsoft Windows XP Professional x64 Edition.
• Automatic cleaning according to your settings during regularly scheduled scans.
To download and install Windows Defender Beta 2, you will need to have an original legitimate Microsoft Windows. If you do not have it, there’s a way to bypass the validation that stops you from downloading and installing Windows Defender Beta 2.
1. Download and install Orca.
2. Download WindowsDefender.msi
3. Run Orca and load WindowsDefender.msi
4. In the left pane, select InstallExecuteSequence
5. Select the Action CHECK_WGA. Right-click it and select Drop Row. Click OK to confirm.

6. Save the MSI file and close Orca.
7. You can now install Windows Defender (beta 2) – and updates
Update 1-December-2006: Windows Defender Beta 2 is no longer available as it has become final version. To crack the final version of Windows Defender, follow the steps below.
1. Download and install Orca.
2. Download WindowsDefender.msi
3. Run Orca and load WindowsDefender.msi
4. In the left pane, select CustomAction
5. Select the Action CHECK_WGA. Right-click it and select Drop Row. Click OK to confirm.
6. Again in the left pane, select Dialog
7. Look for the dialog CheckWGA, change the Attribute from 2 to 0
6. Save the MSI file and close Orca.
I am stunned to find this method to bypass the Windows Defender Beta 2 validation because you are actually using Orca, which is a part of the Microsoft’s Platform SDK Components, to edit MSI file and bypass the validation! Microsoft created the validation, and they have their own tool to bypass it. WEIRD!