I was working on setting up a VM for my server farm and mis-configured one of the vhdx drives. I ended up having to delete that drive and recreate it in Hyper-V manager. When I did though, I received an error stating that I could not start the virtual machine:<\/p>\n\n\n\n
An error occurred while attempting to start the selected virtual machine(s). Each virtual machine is started using a virtual machine account. The virtual machine account needs read and write access to the .vhd\/.vhdx file, but if the file has just been copied from somewhere then it most likely lacks the necessary file permissions. There are a few ways that you could remediate the issue. The simplest way, if it is a new VM, is to remove the drive in the VM settings and then re-create it from scratch. That is what fixed it for me. ‘PC-Name’ failed to start. (Virtual machine ID B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD) ‘PC-Name’ Microsoft Emulated IDE Controller (Instance ID XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX): Failed to Power on with Error ‘General access denied error’ (0x80070005). (Virtual machine ID B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD) You will need to substitute the path to the vhd\/vhdx file – you can obtain this from the original error message, and the Virtual-Machine-ID that you obtained from the “See details” part of the error. NOTE: If you get the message “Failed processing 1 files” then check the virtual machine ID.<\/strong><\/p>\n\n\n\n There is also a PowerShell Gallery script that is supposed to remediate this issue: REFERENCES:<\/em><\/strong> I was working on setting up a VM for my server farm and mis-configured one of the vhdx drives. I ended up<\/p>\n
\u2018VMName\u2019 failed to start. (Virtual machine ID \u2018SomeID\u2019)
\u2018VMName\u2019 Microsoft Emulated IDE Controller (Instance ID \u2018SomeID\u2019): Failed to Power on with Error \u2018General access denied error\u2019 (0x80070005). (Virtual machine ID \u2018SomeID\u2019)
\u2018VMName\u2019: IDE\/ATAPI Account does not have sufficient privilege to open attachment \u2018C:\\Users\\Public\\Documents\\Hyper-V\\Virtual hard disks\\DiskName.vhdx\u2019. Error: \u2018General access denied error\u2019 (0x80070005). (Virtual machine ID \u2018SomeID\u2019)
\u2018VMName\u2019:\u00a0 Account does not have sufficient privilege to open attachment \u2018V:\\Hyper-V\\Virtual hard disks\\DiskName.vhdx\u2019. Error: \u2018General access denied error\u2019 (0x80070005). (Virtual machine ID \u2018SomeID\u2019)<\/em><\/p>\n\n\n\nCauses<\/h4>\n\n\n\n
That happened in my case because I had just created the vhdx drive and did not create it from the VM itself. I just attached it to the VM. So, when I booted the VM, it gave the error. <\/p>\n\n\n\nRemediation<\/h4>\n\n\n\n
Another way is to add the VM GUID to the permissions so that it can access the vhdx file properly:<\/p>\n\n\n\n
‘PC-Name’: IDE\/ATAPI Account does not have sufficient privilege to open attachment ‘E:\\Hyper-V\\PC-Name\\Virtual Hard Disks\\MyVHD.vhdx’.
Error: ‘General access denied error’ (0x80070005). (Virtual machine ID B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD)
‘PC-Name’: Hyper-V Virtual Machine Management service Account does not have sufficient privolege to open attachment ‘E:\\Hyper-V\\PC-Name\\Virtual Hard Disks\\MyVHD.vhdx’.
Error: ‘General access denied error’ (0x80070005). (Virtual machine ID B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD)
Where PC-Name will be the name of your virtual PC. The long sequence of letters and numbers (in my case above “B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD”) is the Virtual Machine ID. This number is significant and you need it to fix the problem.<\/p>\n\n\n\nicacls \"full-path-to-vhd-or-vhdx-file\" \/grant \"NT VIRTUAL MACHINE\\Virtual-Machine-ID\":(F)<\/pre>\n\n\n\n
So the line for me was:<\/p>\n\n\nicacls \"V:\\LDLNET\\Hyper-V\\PC-Name\\Virtual Hard Disks\\MyVHD.vhdx\" \/grant \"NT VIRTUAL MACHINE\\B9C4F7D4-0009-4BE2-90FB-9D60B1A06BDD\":(F)<\/pre>\n\n\n\n
http:\/\/www.ntsystems.it\/page\/PS-Restore-VMPermissionps1.aspx<\/a>
I haven\u2019t tried it but it looks as it would work. Please review and leave a comment should you have issues with the script.<\/p>\n\n\n\nHAPPY TROUBLESHOOTING!
PLEASE COMMENT!
POSITIVE ENERGY!<\/h2>\n\n\n\n
Resolved: Hyper-V General access denied error when trying to load a Virtual Hard Drive<\/a><\/em>
Restore-VMPermission<\/a><\/em>
Virtual machine fails to start with General access denied error \/ Account does not have sufficient privilege to open attachment<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"