Courtesy of ~Robear Dyer (PA Bear)
MS MVP-Windows (IE/OE, Security, Shell/User):
Before proceeding, please read! =>
http://msmvps.com/blogs/spywaresucks/archive/2006/03/21/87123.aspx
1. First try uninstalling via Add/Remove Programs. (Tip: Make sure Show
Updates box is checked.)
If IE7 isn't found there, try the following which is based on the notes of
MVP Sandi Hardmeier:
2. Run the commandline
%windir%\$NtUninstallie7bet2$\spuninst\spuninst.exe (IE7 Beta2)
%windir%\$NtUninstallie7bet2p$\spuninst\spuninst.exe (IE7 Beta2 Preview)
Replace %windir% (above) with the path to your Windows folder, most often
'C:\Windows'. Make sure Show Hidden File and Folders is enabled via Control
Panel > Folder Options.
or
3. Go to the key
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
Right click on Internet Explorer > New String Value > Name that value
InstalledByUser (the value of the new String should be your User Account
name) > Uninstall IE7 via Add/Remove Programs.
Some software (for example CCleaner) deletes uninstaller directories such as
$NtUninstallie7bet2$ (or $NtUninstallie7bet2p$, for IE& Beta2 Preview).
If the $NtUninstallie7bet2$ folder is empty, or has been deleted completely,
whether by third party software or manually to preserve disk space, you will
not be able to remove the Beta 2 Preview via Add/Remove Programs or the
commandline. If running System Restore does not resolve the situation for
you, then your only choice is to stay with the Preview, or format your PC
and install Windows anew. You will not be able to install any future builds
of IE7 while Beta 2 Preview is installed, nor will you be able to run a
Repair Install of XP
