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I have an HP Pavilion dv6 laptop. It came with Windows 7 preinstalled, and I upgraded it to Windows 10. A little while after I was wanting to use Ubuntu, so I attempted to install it. I figured out that there were already 4 primary partitions on the hard drive. There was the the two ntfs partitions Windows uses, a third ntfs partition called recovery, and a fat32 partition called hp_tools. I deleted the recovery and fat32 partition. When I attempted to boot Windows 10 after the partitions were deleted, it failed to boot. It stopped a little while into the part with the spinning circle. The error code read: INACCESSIBLE_BOOT_DRIVE. It automatically restarted, and came up with the recovery and repair menu. I tried clicking reset, but it said the drive was locked. None of the other options worked either. I foolishly didn't back up the computer before messing with the partitions, so the only thing I could think of to do was reinstall Windows 10. I used my desktop to create a bootable Windows 10 installation flash drive. I am not sure if I should format the hard drive and attempt to do that, or what. The only activation key I have is the old Windows 7 one on the sticker on the bottom. Any ideas of what I should do?

  • Make a back up now so at least if you make things worse you can get back to where you are now. – David Schwartz Sep 30 '15 at 20:27
  • Reinstall W10 clean, it should activate since it already did the first time. – Moab Sep 30 '15 at 20:35
  • @Moab Should I format the hard drive first? – Phillip Sep 30 '15 at 20:38
  • I've never clean installed Windows 10 so I'm not sure whether it will automatically format the hard drive first. – Phillip Sep 30 '15 at 20:39
  • It should but it may not know what to do with the Ubuntu partitions, I suggest you wipe the drive with dban first, you can run the program for 15 minutes to wipe all partitions, then cancel the wipe, no need to wipe the entire drive as it takes a long time. – Moab Sep 30 '15 at 20:54
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Wipe the hard drive and then reinstall windows 10. I am not sure if Windows 10 will activate. Though...you could always reinstall windows 7 and then do the upgrade again, and perform backups.

  • Windows 7 was preinstalled, so I don't have an installation disc. And Microsoft's website won't allow me to download an iso for windows 7 with the oem product key I have. – Phillip Sep 30 '15 at 20:44
  • If you have the disk and PK for Win10...just format the HD and install Win 10. – Gerasimos.Zap Sep 30 '15 at 20:44
  • That's the thing, I don't have a windows 10 product key. It automatically activates when you upgrade from 7. – Phillip Sep 30 '15 at 20:47
  • Modern machines do not come with recovery disks sigh. You mentioned that you have a bootable win 10 on a USB drive. Why not boot from that USB drive? How did you reinstall Windows 10? – Gerasimos.Zap Sep 30 '15 at 20:50
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    If W10 was ever activated on that hardware, it will activate doing a clean install , when it asks for a product key just skip it, once the desktop loads it will activate using the previous activation on that hardware profile. – Moab Sep 30 '15 at 20:57

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