Some users on XP Pro sp3 clients on our network (sbs 2008 server environment) have had the SEP shield with a red circle in after getting the above message pop up when logging on to their workstations. Opening SEP shows 'No protection technologies' installed.
I had a hunch this had something to do with user permissions or profile corruption as logging on to the same machine as administrator, the SEP shield displays correctly with the green dot.
I found this post and after editing the ACL for the two dll's msvcp71.dll and msvcr71.dll with cacls.exe the problem disappeared:
Open a cmd prompt, CD to \windows\system32 and give :
cacls.exe msvcp71.dll /E /G BUILTIN\Users:R
and same for the other one, jobs a good un as they say. This gives read permission to the 2 library files.
Hope this helps someone else as it helped me!
Laoan54