hit the refresh button
The easiest way is to download and install that program again. If you want to re-install the program, inform us which program was that and what do you mean by "refresh".
Press F5 every time you want to refresh the page
No reason.
F5
Gpupdate
In Windows 10, the refresh button typically appears as a circular arrow icon. You can find it in File Explorer’s toolbar, usually located at the top left corner, next to the address bar. Additionally, you can refresh a window by right-clicking inside the folder and selecting "Refresh" from the context menu. The keyboard shortcut for refreshing is F5.
There is NO Refresh button on the PC.. however, F5 can work as a refresh button in Windows Environment
A clean install is when you would have it turned on for the first time. There is nothing else there but windows stuff. If you want to 'refresh' your windows files, consider re-formatting
There is no Windows 8.
There isn't any Windows 7.8, but if you were referring to Windows Phone 7.8, it cannot be updated to Windows Phone 8 (note that I did not say Windows 8 because Windows 8 is for laptops, desktops and some tablets).
Windows 8 is commercial. You need to by a Windows 8 book.
Many internet windows and programs will have different buttons to manage the open windows. Buttons may include a file, edit, refresh, bookmarks, and tools windows.