Cannot create host-only adapter (Windows 7)

When I try to create host-only interface with command
I get the following error:
When I try to do the same using VirtualBox Manager (File | Preferences | Network | Host-only networks) I get error dialog with text:
See screenshot:
This problem happened during installation of Docker but it doesn't related to it.
After each attempt to create the adapter I can see new "Unknown Device" in Windows Device Manager's "Network Adapters" section. At the same moment there is also VirtualBox Host-Only Ethernet Adapter in Device Manager.
I tried to reinstall the application, to delete existing HostOnly adapter, nothing helps.
I have several virtual machines but they are not in active state. There are Aventail VPN in my systesm and PulseVPN but connections were also inactive when I tried that.
Please help. What logs or additional information can I provide to fix the problem? I really need this to be fixed as it is a blocker for me.
OS: Windows 7, 64-bit.
VirtualBox versions I tried: 5.0.24 (Docker installs it), 5.1.6
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VBoxManage hostonlyif create
I get the following error:
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0%...
Progress state: E_FAIL
VBoxManage.exe: error: Failed to create the host-only adapter
VBoxManage.exe: error: Could not operate the communication channel (VERR_BROKEN_PIPE)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component VirtualBoxWrap, interface IVirtualBox
VBoxManage.exe: error: Context: "enum RTEXITCODE __cdecl handleCreate(struct HandlerArg *)" at line 71 of file VBoxManageHostonly.cpp
When I try to do the same using VirtualBox Manager (File | Preferences | Network | Host-only networks) I get error dialog with text:
- Code: Select all Expand viewCollapse view
Could not operate the communication channel (VERR_BROKEN_PIPE).
Result Code: E_FAIL (0x80004005)
Component: VirtualBoxWrap
Interface: IVirtualBox {0169423f-46b4-cde9-91af-1e9d5b6cd945}
See screenshot:
This problem happened during installation of Docker but it doesn't related to it.
After each attempt to create the adapter I can see new "Unknown Device" in Windows Device Manager's "Network Adapters" section. At the same moment there is also VirtualBox Host-Only Ethernet Adapter in Device Manager.
I tried to reinstall the application, to delete existing HostOnly adapter, nothing helps.
I have several virtual machines but they are not in active state. There are Aventail VPN in my systesm and PulseVPN but connections were also inactive when I tried that.
Please help. What logs or additional information can I provide to fix the problem? I really need this to be fixed as it is a blocker for me.
OS: Windows 7, 64-bit.
VirtualBox versions I tried: 5.0.24 (Docker installs it), 5.1.6