“In the last few days millions of people have upgraded Windows 7 and 8.1 systems to Windows 10. But suppose you have tried Windows 10 and now you want your old system back? As long as it has not been more than 30 days since you installed Windows 10, there is an easy way to downgrade.
Here is the procedure. (You will need to be in an administrative account.) Since something can always go wrong, first back up any personal files and data. Also, if a laptop or tablet is involved it will need to be plugged in since the rollback can take a while.”
Read it all, including comments, at www.techsupportalert.com.