Restore point takes more than 3 hours.

If you restore your computer the deleted malware infections could also be restored back and infect your computer again. If you associated a Microsoft account with Office, you don't need a product key. If Office is prompting you for a product key, you can enter your Microsoft account instead. Try selecting the Sign in with an active account instead link in the Enter your product key dialog box and sign in with the Microsoft account that you associated with Office.

• Download Magical Jelly Bean and follow the installation process to install it on your computer.
• Launch the program. You can find it by opening the Start menu, typing keyfinder, and pressing Enter.
• The program will scan your installations and find the product keys of supported programs, including various versions of Windows and Microsoft Office.
• When the scan is complete, the tool will display a window with entries in the left pane for whatever installed versions of Windows and Office it detected.
• Click the entry for your version of Microsoft Office to reveal the key and other information about that installation. The same advice goes for Office: Your key will be listed under ‘CD Key’ on the right side of the window. Record this information exactly, as the key will not work otherwise.