While trying to install a program which contained SQL Server Express, I received the error that the Microsoft Installer was not functional. I then went to the site to download. Went I went to download v3.1 it told me a newer version was out, 4.5. When I went to install that, it didn't work and when I uninstalled, everything said there was a new version.
System restore didn't help. Now I can't install anything and, in fact, everytime I reboot, it tries to run the installer.
The actual error message is: Installatin file missing: WindowsInsterall-KB893803-v2-x86.exe SQL Server Express installation failed.
This occurs whether I try to install SQL Server by itself or with the program. It also now occurs with any install.