Remove encryption on Windows file/folder

How to remove the encryption:

1. Right-click the folder or file you want to decrypt, and then click Properties.
2. Click the General tab, and then click Advanced.
3. Uncheck Encrypt contents to secure data check box, click OK, and then click OK again.

Removing encryption on Windows directory.

Troubleshooting Vagrant

Running Vagrant in Windows 7 host and stuck into problem:

The VM failed to remain in the "running" state while attempting to boot. This is normally caused by a misconfiguration or host system incompatibilities. Please open the VirtualBox GUI and attempt to boot the virtual machine manually to get a more informative error message.

Solution:
Uncheck "Enable IO APIC" in your VM settings.