1) Run below command in powershell with admin mode:
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
2) run below command in command prompt with admin mode:
bcdedit /set hypervisorlaunchtype off

3) disabled Hyper-V: Control Panel\Programs\Programs and Features\

4) VMBox memory made it to: 3155 MB (VMbox->settings->system)
VM box Acceleration is deactivated. How do activate this? and fix above error?

Restart your system.