Intel VT-x virtualization
Many PC laptops (especially those from Lenovo, HP, and Dell) have Intel’s VT-x virtualization turned off by default, which can cause issues with many Vagrant boxes. Check your computer manufacturer’s knowledge base for instructions for enabling VT-x in your system BIOS/UEFI settings.
Lenovo instructions:
http://amiduos.com/support/knowledge-base/article/enabling-virtualization-in-lenovo-systems