By default iPrint tries to install its virtual-printer on your system using the LPT1 port.  This can sometimes cause issues if you already have something using that port which doesn't share well OR if your system doesn't have an LPT1 port.

We will be bringing out a fix for this shortly so you don't have to worry about it... but in the meantime, if you get this problem when installing or using iPrint, please follow these steps to correct the issue:-

1. Open your computers Printers folder (Click the Start button->Control Panel->Printer and Faxes).

2. Right-click on the iPrint printer and select Properties from the drop-down menu.

3. Select the Ports tab and click the Add Port button.

4. In the popup window, make sure Local Port is selected in the list and click the New Port button.

5. Enter a new name for the port e.g. iPrintPort - and click the OK button.

6. Make sure that the iPrint printer is assigned to the newly created port (see below):

7. Click Apply to finalize the changes and close the printers window.