It seems like you are encountering a situation where a window appears frozen to Windows 7, even though it is still running. In this case, you are only presented with the option to close the window. Here are a few steps you can try to address this issue: 
Steps to Address a Frozen Window Issue in Windows 7:
 
- Task Manager Method:
- Press Ctrl + Shift + Escto open Task Manager.
- In the "Applications" tab, right-click on the unresponsive application.
- Select "Go To Process" to highlight the associated process in the "Processes" tab.
- Right-click the process and choose "End Process."
 []Alt + F4 Method:
- Click on the frozen window to make sure it is active.
- Press Alt + F4on...