Update: Failed to lock /var/cache/apt/archives/lock

Update: Failed to lock /var/cache/apt/archives/lock

I am running the upgrade(12.10 to 13.04) through terminal and it keeps getting stuck at this:
Failed to lock /var/cache/apt/archives/lock
What do I do? I have root access. I have no idea what else to try other than a clean install.
Checking package manager
Reading package lists... Done   
Building dependency tree         
Reading state information... Done
Building data structures... Done

Calculating the changes
Calculating the changes

Do you want to start the upgrade?

3 packages are going to be removed. 155 new packages are going to be
installed. 1204 packages are going to be upgraded.

You have to download a total of 595 M. This download will take about
1 hour 15 minutes with a 1Mbit DSL connection and about 23 hours with
a 56k modem.

Fetching and installing the upgrade can take several hours. Once the
download has finished, the process cannot be canceled.

 Continue [yN]  Details [d]y

Fetching

Could not download the upgrades

The upgrade has aborted. Please check your Internet connection or
installation media and try again. All files downloaded so far have
been kept.

Failed to lock /var/cache/apt/archives/lock


Restoring original system state

Aborting
Reading package lists... Done   
Building dependency tree         
Reading state information... Done
Building data structures... Done
root@chaitanya-XPS-Ubuntu:~#