![]() ![]() But the instructions listed above did not fix the problem. The key problem identified seems to be the bootrec /scanos command comes back with Total identified Windows installations: 0. After trying the built in windows repair stuff and poking around online and I found lots of similar advice relative to fixing the BCD (eg, ), but none of it has helped at all. I went into my bios and changed the boot to legacy to get the usb to boot, after testing I switched the bios back, but my computer wouldn't boot. The other day I needed to test a usb drive with the standalone windows defender app on it that I was trying to run on another machine. Still amazed that I couldn’t find this issue mentioned in any of the stuff I found on the net … perhaps because others have the sense to clone not copy when swapping systems to a new disk.Running windows 10, 64 bit on a dell laptop (inspiron 14z), this was an upgrade from win8 which I did quite a while ago, I removed all traces of win8. The EFI system partition has it’s own specific Type ID:Ĭhanged the partition type ID and now all works as it should. Finally worked out it’s the partition Type ID that was wrong. Eventually dawned on me that perhaps because I’d copied not cloned some marker on the partition was missing so Windows couldn’t identify the EFI system partition. Anyhow, I basically made the mistake of copying the system EFI partition rather than cloning it. ![]() I should mention that I used BCDBoot to get the SSD to boot OK, so that wasn’t an issue. lazy, method of copying partitions and only cloning the Windows partition (had bad sectors) using sector to sector clone. The SSD was smaller then original HDD so couldn’t clone easily due to size difference and bad sectors on old disk. Just thought I’d add another possibility in regard to this error “Device not found” which affects these windows boot utilities looking for the BCD store (bcdedit, bootrec etc).Wasted a huge amount of time trying to find the answer to my issue which resulted after swapping Windows 10 system to an SSD. If it’s not, it’s probably time to call a professional!ĭonate to say "Thanks" if this post has helped save you time and money! ? Partition 1 is now the selected partition.ĭiskPart successfully shrunk the volume by: 1024 MBĭiskPart succeeded in creating the specified partition.ĭiskPart successfully formatted the volume.įollowing these steps, the machine should now be bootable. I’ve bolded the commands I typed to make it easier to read - hold on tight:Ĭopyright (C) 1999-2013 Microsoft Corporation. Here’s how it’s done at a command prompt from a recovery environment. However, all is not yet lost! It’s fixable - but in order to accomplish it, you must recreate the EFI partition manually and then reload the boot parameters from there. If this happens, most people will tell you that you will need to reinstall Windows from scratch. Sometimes the tools (especially if executed externally on another system rather than live within the target OS) will remove the EFI partition and only image the Windows partition. This is most often the case following a drive image using imaging tools to a new SSD for example. Other times, forcibly removing the EFI and boot folders from the EFI partition and then executing the bcdboot command with a specific system partition parameter (e.g.: bcdboot X:\windows /s E:, where X: is the Windows partition and E: is the EFI paritition) works.īut let’s say the partition is missing altogether. If it’s corrupt but still exists, you can simply enter diskpart, select the system partition (usually around 500 MB in size and with an ID of “EFI”) and assign it a letter, exit diskpart, and then perform a chkdsk command on the new partition assignment. Essentially, the system is looking for the EFI partition, which in this case is either missing or corrupt. ![]() This is bad news on a GPT disk using UEFI rather than BIOS. Performing bootrec /fixboot also provokes the following error: The requested system device cannot be found. The boot configuration data store can not be opened. In many cases the failure is evident when attempting to perform bcdedit /enum and receiving a message such as this one: However, other times, even in spite of this command properly completing, the system still will not boot. ![]() Generally speaking, it’s often easy enough to accomplish this by executing the command bcdboot X:\windows (where X is the system drive letter) from a recovery environment. With GPT disks and UEFI all the rage now, it’s not uncommon to encounter a scenario where boot parameters need to be repaired in order to reach the operating system. ![]()
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