I believe icons across the bottom is Verizon, but it may not be available for the 8100 series. Download the OS for your device from your provider (or get the latest OS for your device), then rename or delete the file:
C:\Program Files\Common Files\Research In Motion\AppLoader\Vendor.xml
Then fire up Desktop Manager and use Add/Remove programs and update the OS. If it's available for the 8100, it should show up. It did on an 8300.