Display the Help.
Rename the selected item.
Search for file or folder
Display the address bar list in Windows Explorer
Refresh the active window
Go to the address bar in browser
spell and grammar check in a document in MS programs.
When system is going to start, and if you press F8 then, it will open in safe mode i.e. access Windows in safe mode
Normally function key F9 not defined any work in Windows. But its can be perform task such as controlling BIOS setup programs, switching display unit etc.
Activate the menu bar in the active program
Go to full Screen in browser
Dock/Undock into Separate Window
Alt + F4
Exit the active window
Ctrl + F4
Close the active window
Shift + F10
Display the right click menu for the selected menu