Some of the most common and helpful Windows keyboard shortcuts are:
Ctrl+C will copy a selected item to your clipboard
Ctrl+V will paste the item in the clipboard
Ctrl+Z will undo the previous action
Ctrl+P will print the current page/document
Ctrl+S will save the current page/document
Ctrl+F will open the search to find a term in the current page
A full list of keyboard shortcuts for Windows can be found here.