When requesting assistance, please provide the complete model name and product number (p/n) of the HP computer in question. HP/Compaq makes thousands of models of computers. Without this information it may be difficult or impossible to assist you in resolving your issue.
Please see The Windows Club - Rollback from Windows 10 to your previous version of Windows for information on how to rollback to your previously installed OS. This option may not be available depending on how you chose to install Windows 10. If it is not available, you may be able to mark the HP Recovery partition as active ( please see Marking a partition as active). This may allow the computer to enter the HP Recovery routine after the computer is rebooted. If you are able to return to the original factory OS, I would immediately create the HP Recovery Media for future use.
If you have any further questions, please don't hesitate to ask.
Please click the White KUDOS "Thumbs Up" to show your appreciation
***** Please click the "White Kudos" Thumbs Up to say THANKS for helping ***** ***** Please click the "Accept As Solution" on my post, if my help solved your issue ***** ***** This is a user supported forum. I am a volunteer and I don't work for HP *****
HP a1632x - Windows 7, 4GB RAM, AMD Radeon HD 6450 HP p6130y - Windows 7, 8GB RAM, AMD Radeon HD 6450 HP p6320y - Windows 7, 8GB RAM, NVIDIA GT 240 HP p7-1026 - Windows 7, 6GB RAM, AMD Radeon HD 6450 HP p6787c - Windows 7, 8GB RAM, NVIDIA GT 240 HP ENVY x360 m6-w103dx - Windows 10, 8GB RAM, Intel HD 520