I was recently installing Ubuntu 12.04 LTS on a Virtual Machine via my VMWare Player 6 on a Windows 7 laptop. The installation kept getting hung up on "retrieving file 52 of 114" for hours.
The issue was the existence of Network connection was set to Connect at Power on. However, since we are in installation mode Ubuntu itself appears to not yet be connected to the network but it seems that if detects a network adapter it tries to get something from the Internet.
In turn, I disconnected the Network Adapter via the VMWare Player "Removable Devices" and the installation immediately continued by looking for local files.