Tech Notes :- Vagrant up error (193) with virtualbox on windows

I always use vagrant to bring up the required Virtual Machines with virtual box.Unfortunately, this time vagrant up was throwing below error.

There was an error running VBoxManage. This is usually a permission
problem or installation problem with VirtualBox itself, and not Vagrant.
Please note the error message below (if any), resolve the issue, and
try Vagrant again.

 (193)

Tried different options to solve this, but nothing worked. As a last option, I searched for any corrupt  VBoxManage.exe and there you go, there was another 0-byte copy in c:\windows\system32. I just deleted that file and then vagrant up worked as usual.

Tech Notes :- CentOS 7 / RHEL 7 - No Internet Access From Virtual Box

Often after the default installation of RHEL 7 or CentOS 7 on VirtualBox internet access or for that matter network connectivity don't work . The solution is simple. Just make the below edits

vi /etc/sysconfig/network-scripts/ifcfg-enp0s3

Change the entry

ONBOOT=no 

to

ONBOOT=yes

reboot your machine or just restart network service.

Thats it !!! :)