Ubuntu Struggle

Unable to open Ubuntu Software Centre

Try out the following commands in terminal  

sudo rm -f /var/lib/apt/lists/*
sudo apt-get update

This is for upgrade  

sudo apt-get update && sudo apt-get upgrade 

Virtual Box (After Update of Kernel) 

After Updation of the kernel you will probably see that you are not able to open you operating system in virtual box, this is because you have to compile your virtual box driver again for the new kernel 

try the following steps- 

1. Removing 

sudo apt-get remove virtualbox-dkms

2. Installing it again 

sudo apt-get install virtualbox-dkms

3.sudo modprobe vboxdrv 

After trying out the above commands you will be able to use your operating in virtual box 

The other alternative is you can install virtual box software from ubuntu software center again.