Alternative steps for Windows Vista or for Windows Server 2008
To uninstall Internet Explorer 8 Beta 2 in Windows Vista or in
Windows Server 2008, follow these steps:
Carefully select and then copy the following command:
FORFILES /P %WINDIR%\servicing\Packages /M
Microsoft-Windows-InternetExplorer-8*.
mum /c "cmd /c echo
Uninstalling package @fname && start /w pkgmgr /up:@fname /norestart"
Click Start, and then type cmd.exe in the Start Search box.
In the list of programs, right-click Cmd.exe, and then click Run as administrator.
Note If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
Right-click inside the Administrator: Command Prompt window, and then click Paste to paste the command that you copied in step 1.
Press ENTER to uninstall Internet Explorer 8 Beta 2.
When the uninstall program is finished, restart your computer.
Verify that your earlier version of Internet Explorer was
restored
Alternative steps for Windows XP or for Windows Server 2003
To uninstall Internet Explorer 8 Beta 2 in Windows XP or in
Windows Server 2002, follow these steps:
Carefully select and then copy the following command:
%windir%\ie8\spuninst\spuninst.exe
Click Start, click Run, type cmd.exe, and then press ENTER.
Right-click inside the cmd.exe window, and then click Paste to
paste the command that you copied in step 1.
Press ENTER to uninstall Internet Explorer 8 Beta 2. When the uninstall program is finished, restart your computer.
Verify that your earlier version of Internet Explorer was
restored
http://support.microsoft.com/kb/957700#ALTWin6