error 21a. No boot device discovered even with a bootable USB. Running Windows 10 oni5. . Have all

[Snazzy_Shazzie]

I stupidly unleashed a virus on my HP i5 when i was uninstalling an app. If I wasnt so sick  i would have noticed and stopped the .exe file.  Kicking myself.  So I haven't been able to get ino Windows for maybe 40-60 attempted boots (Yeah, she's probably fried) since before Christmas; its not picking up the OS on the bootable USB'S I made, and I made a few to test. On my other HP..  Tried changing the BIOS startup sequence lots of times. Tried all USB ports in those sequences. I get error 185 also, as 0x000185 or something. Thinking of making the HDD a slave to salvage the photos that arent backed up elsewhere, as a plan Z. Any help woukd be absolutely amazing!! Thank you in advance..

[Riddle_Decipher]

@Snazzy_Shazzie Greetings from the HP Community!

Note: Please ensure the complete product name/number for a quicker response from the community, as we need to know what we are dealing with to provide an accurate solution: 

Click here for steps on finding the information we need!

Remember: Do not share any of your personal information such as serial, phone number, email ID, etc.

Meanwhile, here's all you need to know:

Step 1: Perform a hard reset

HP Notebook PCs - Performing a Hard Reset or Forced Reset

Step 2: Restore BIOS default settings

Step 3: Test the hard drive using HP PC Hardware Diagnostics UEFI (In your case, Skip to Step 4)

Step 4: Re-seat the hard drive (here's a generic video that shows how to re-seat the drive: Click here) > 3F0 error represent a hardware malfunction, a reseat should help, if it doesn't or you aren't comfortable, please Contact HP as the next step will not help.

Step 5: Perform an HP System Recovery

If none of the above actions resolved the error condition, back up your personal data and then perform an HP System Recovery on the notebook. See one of the following documents for instructions:

Click here for instructions.

FOR DETAILS & FURTHER INSTRUCTIONS, USE THIS LINK: CLICK HERE

(By the end of this article all the issues should be resolved)

Keep us posted,

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Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

Have a great day!