Data backup while windows is corrupt

Mostly we get issues in corruption of windows that our important data gets lost in windows

To backup there are many ways devised
1. Make your hard drive external. ( this method is easiest but may void your warranty too)
2. Use bootable pendrive
       i. Boot from pendrive
       ii. At installation screen, press shift and f10 together
        iii. At command windows, type notepad
        iv. In notepad, click on file then click on save as
       v. Now u may copy folder or file
3. Use live windows pd
       i. Use ubuntu live: boot from pendrive,  click on try ubuntu at installation screen. Copy your data by accessing ur drives
       ii. Use windows live:  boot from pendrive, copy your data as needed

Note: 1st method is easy if you can access your hard disk physically but if you cannot access it directly . You need to open whole system which may void warranty as well as breaking of some parts
2nd method can only copy one folder at a tine