system diagnostic stuck on 99 percent

[Scouse59]

I was given a HP Pavilion laptop, every time I turn it on  I seem to have to reinstall windows.  Now it's saying it Boot Device not found. I have used the System Diagnostics software to check the hard drive, but it's stuck on 99%. Does this mean the hard drive has failed? If so is it possible to get my files off it?

[WAWood]

Sounds like Windows got corrupted due to drive failures and was forcing you to do setup again every time you boot.

If your PC can not boot into Windows, a way around that is to follow the instructions below to create boot media from Macrium Reflect (MR) that can be used to boot your PC even if the hard drive is not working:
1) Download and install Macrium Reflect (MR) from this link on a working PC: http://www.macrium.com/reflectfree.aspx
2) Use the option to create a boot USB stick or CD

That will create MR bootable media. Then, you can boot your PC into WinPE using that media.

Here's a document from Macrium Software describing the Rescue Environment:
https://reflect.macrium.com/webhelp/Windows_PE_Rescue_Environment.asp

Have patience, as that can take a while to start and bring up the screen.

If your disk still works, you might be then able to retrieve some files and folders from it.

Good Luck