Issue:
If you installed and uninstalled any XE or 8.9 Standalone on your PC, the registry probably has a .dll entry to use IE6. This must be manually changed to a new .dll to use IE7.
The Solution:
Verify and change the registry key; you use the Start Up Menu and Run REGEDIT.
Find
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ TypeLib\ {EAB22AC0-30C1-11CF-A7EB-0000C05BAE0B}\1.1\0\ win32\
If it is set to IE6, the value shows c:\windows\system32\ shdocvw.dll – where c:\windows is the Windows install directory.
If it is set to IE7, the value shows c:\windows\system32\ ieframe.dll – where c:\windows is the Windows install directory.
Change the registry to use the IE7 ieframe.dll; EnterpriseOne 8.12/9.0 applications work with IE7 without issues.