After posting I found this on MS site
Uninstalling Internet Explorer 7 Beta 2, Beta 2 Preview, or Beta 1
To uninstall Internet Explorer 7 Beta 2, Beta 2 Preview, or Beta 1 and return to Internet Explorer 6 on Windows XP or Windows Server 2003
Click "Start", and then click "Control Panel"
Click "Add or Remove Programs"
Scroll down to "Internet Explorer 7 Beta 2" or "Internet Explorer 7 Beta 2 Preview", select it, and then click "Change/Remove".
If not found, check "Show Updates" at the top of the dialog box, scroll down the list to "Windows XP - Software Updates", select "Internet Explorer 7 Beta 2 Preview" or "Internet Explorer 7 Beta 1" and then click "Change/Remove".
If you cannot find any Internet Explorer 7 entry in "Add or Remove Programs", try running these commands. Each is for a different release of Internet Explorer 7 so only one will succeed.
%windir%\$NtUninstallie7beta1$\spuninst\spuninst.exe. (To do this, you need to have "view hidden folders" enabled.)
%windir%\$NtUninstallie7bet2p$\spuninst\spuninst.exe. (To do this, you need to have "view hidden folders" enabled.)
%windir%\$NtUninstallie7b2pmx$\spuninst\spuninst.exe. (To do this, you need to have "view hidden folders" enabled.)
%windir%\$NtUninstallie7beta2$\spuninst\spuninst.exe. (To do this, you need to have "view hidden folders" enabled.)