I wish I knew, as Windows 10 messed up my HP Pressario Computer. Never opened up so I can use it after Windows 10 downloaded. Microsoft people suggested I join a "forum" to seek answer.
(I now am using an old Window XP98, which I had luckily saved and not thrown away, had to download Firefox program to make it work, since the old XP program was obsolete.)
Turns out hundreds if not thousands of people have had their computers crash after downloading Windows 10, and no workable solution has been suggested except to:
-- try to open up with New User", then you can delete programs from there, or do a system restore.
My problem is I cannot even open "start" menu or click on the "new user" icon, with the desktop not even opening.
I posted a question on Answers asking how to fix this over month ago,
no one answered me.
Other people on MS Forum reported "funny stuff" with other programs that failed after upgrading to Windows 10.