Windows 10 not booting

[SpoodermanYT]

Okay so I installed windows 10 on my HP Desktop and now when it boots i get this error message: Windows could not complete the installation. To Install windows on this computer restart the installation. you see i am trying to upgrade my windows 7 HP Desktop to windows 10 I got Windows 10 from best buy and using the usb to install it can I get windows to work without formatting the drive I backed up all my stuff to another drive but it would be nice to have the files without formatting the drive though. and its a HP Bios fyi Thank you for the help.  

[Slottr]

Have you tried doing what it's said you should do? And yes, you should be able to just upgrade your windows rather than reinstall it completely.

[SpoodermanYT]

Yes I did still i get the error message. 

[Gonio]

Maybe it's blocked becayse of the HP layer. Had this similar problem changing a HDD for a SSD on a HP laptop and clone it. I couldn't fx it, but maybe some one know how to work around that?

[SpoodermanYT]

Maybe ? IDK

[sy5tem]

if you tried upgrade windows 7 from your windows 10 usb key and it failed , there could be a problem with your win7 that caused this.

 

anyways , you will need to boot from a DVD media , a Recovery dvd or partition or the windows 10 install DVD,  boot repair as problem when booting from usb" then chose Troubleshoot than Advanced options and try system restore to try and go back to Win7 , if id does't work you should be able to fix this with bootrec to point to windows boot directory

guide here:

http://www.thewindowsclub.com/repair-master-boot-record-mbr-windows

 

But honestly , backup your data using a bootable backup or clone software. ,format and clean install , it can take you hours to try and repair without the experience and tools.

 

Or buy a 120GB SSD and make a clean install and migrate data from old hard drive.