Downloaded the file and double-clicked to start it running. Asked for and granted permission for it to run.

According to Windows Task Manager, the process is running, but the application is not.

MSE was operating previously. Then I ran into an error message which research prompted me to uninstall AVG Free and MSE, then reinstall each, MSE first. During the uninstall of MSE, the operation showed in Task Manager as Not Responding, so I terminated it.  I tried to reboot, but the close phase would not complete after running for an hour. I executed a hard reboot. The reboot executed, but I still cannot get MSE to work.

BTW, latest software change was a browser add-in called RocketTab. I cannot find a link to uninstall it.

Windows 7

Where do I go from here?