Go here to download Internet Explorer 7 according to your Windows. Just select your operating system like the image below and click on the Go button. It will validate your Windows.

If you’re unable to download Internet Explorer 7 because your Windows is not genuine, here’s the direct download link.

There might be another problem after downloading and trying to install Internet Explorer 7. During Internet Explorer 7 installation, it will again try to validate your Windows to see if it’s genuine. Visit this article on how to “Crack Windows Genuine Advantage“.

Read in some articles that Internet Explorer checks for legitimate Windows XP serial number before installation. Here’s how you can change your Windows XP serial number.
[ Download "How to change Windows XP serial number" ]

If you’ve installed Internet Explorer 7 Release Candidate 1 before, you might have problems installing the official version of IE7. I’ve found a solution that can fix this problem. You must uninstall IE7 RC1 first but you can’t do that in Add or Remove Programs from Control Panel. Here’s how…
1. Go to Start -> Run
2. Type in %windir%\ie7beta3\spuninst\spuninst.exe (It will uninstall IE7 RC1)
3. Restart
4. Run IE7-WindowsXP-x86-enu.exe to install latest official IE7
5. Eventhough it might tell you that installation is not complete, but after restart, the official IE7 is installed

[tags]IE7, Internet Explorer, Windows, Microsoft, WGA, iecustom.dll, IE[/tags]