VirtualBox Guest running extremely slow (Turtle Icon) - Enable VT-X

 Virtualbox guest is running extremely slow in Windows with a turtle in the status bar like this

1. Enable Virtualization (VTx) in the BIOS
2. Open "Turn Windows Features On and Off" and disable the following
   
1.  Hyper-V
2. Virtual Machine Platform
3. Windows Hypervisor Platform
4. Windows Sandbox
5. 
   
    
3. Reboot
4. Check Intel Processor Identification utility
5. 



6.  Check msinfo32.exe

 

Check VirtualBox setting "Enable Nested VT-x/AMD-V".  If it is not greyed out, then its fine.

 

Once done, Virtualbox Guest should look like this