Windows host- only adapter creation fails due to slow background processing). Oracle VM Virtual. Box. I was debugging why Xamarin Android Player could not prepare a VM for me and determined the failure to be in the host- only adapter creation, isolating the problem to this. C: \Program Files\Oracle\Virtual. Box\> VBox. Manage. Progress state: E_FAIL. VBox. Manage. exe: error: Failed to create the host- only adapter. VBox. Manage. exe: error: Code E_FAIL (0x. Unspecified error (extended info not available). VBox. Manage. exe: error: Context: "int __cdecl handle. Create(struct Handler. Arg *,int,int *)" at line 6. VBox. Manage. Hostonly. After some time spent in the debugger, I've found the real error to be CO_E_CLASSSTRING (Invalid class string), naturally returned by some CLSIDFrom. Oracle provides a comprehensive set of tools for upgrading Oracle Database with minimal downtime and for migrating your applications to the new release. If you retain. How to Restore Previous Windows Version After Upgrading to Windows 10? - After launch of Windows 10 for public, we have covered a few topics such as upgrading to. I have the same issue on Windows 7, VirtualBox 5.0.10, when I try to create Docker virtual machine. It is related to https://github.com/docker/machine/issues/1754. When I try to upgrade to Windows 10, the installation fails and rolls back to my previous operating system with the error: We couldn’t install Windows 10. We’ve. String() API call. Interestingly enough, the input GUID string contained garbage only. Further debugging revealed a data race in VBox. Net. Cfg. Win. Create. Host. Only. Network. Interface(). By the time Reg. Query. Value. Ex. W(.., "Net. Cfg. Instance. Id", ..) is called, the network device might still not be fully constructed by another process and this registry value might not be present yet. Because the result of this operation is effectively ignored, the program silently continues and the function fails only later due to the GUID being invalid. A proof from Process Monitor - it took the system ~0. VBox. SVC. exe 1. Reg. Query. Value HKLM\System\Current. Control. Set\Control\Class\{4. D3. 6E9. 72- E3. 25- 1. CE- BFC1- 0. 80. 02. BE1. 03. 18}\0. 01. Net. Cfg. Instance. Id NAME NOT FOUND Length: 1. Reg. Set. Value HKLM\System\Current. Control. Set\Control\Class\{4. D3. 6E9. 72- E3. 25- 1. CE- BFC1- 0. 80. 02. BE1. 03. 18}\0. 01. Net. Cfg. Instance. Id SUCCESS Type: REG_SZ, Length: 7. Data: {F4. CCBF3. A- 4. C8. B- 4. FE7- A6. C3. DF5. 2E6. 9}. Waiting in the debugger for a while before the Reg. Query. Value. Ex. W() call helped and I was able to create host- only network adapters fine. Setting as priority minor because. OS (Windows 1. 0 preview build 1. Virtual. Box (5. 0. BETA1 r. 99. 37. 1). On the other hand, I submitted a ticket anyway because. VBox code has not been changed for the current beta. I hear there was some refactoring done in Windows 1.
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