I have a stumper, One of my clients running 8.8 PL10 got a new client computer with windows 7. Everything went just fine with the installation as admin. and all add-ons and SAP were working great. However the next day when the client turned the computer on SAP would not login, the database selection screen would appear and then after user name and password entry the system would just freeze up and never complete the login, no error message or dump files.
I tried a fresh DI API install to no avail and ultimately ended up uninstalling and re-installing. After the re-install everything worked great again. Great problem solved.. until the next morning that is.. so long story short as long as the computer is not restarted or shut down SAP runs great.
The user is an Admin on the machine. Windows 7 is fully patched an up to date exactly the same as 5 computers in my office (Same Version) that all run without issue.