I have a Windows 7 computer and I am doing some tests: instead of shutting down it properly through the menu shutdown command I switch off the power supply. At the next boot Windows shows the message:
Windows did not shut down successfully. if this was due to the system not responding, or if the system was shutdown to protect data, you might be able to recover by choosing one of the following Safe Mode Configurations from the menu below:
Safe Mode with networking
Safe Mode with Command Prompt.
Start Windows Normally
Now, the bold statement caught my attention: "if the system was shutdown to protect data", when do I need to cut off the power supply in order to protect the data?