If you own the Samsung Galaxy Tab (GT-P1000) here’s how to install a driver for Windows. It does not appear to be available from Samsung, however, it is but not as a separate download. Selecting the GT-P1000 in the search on the support pages does not reveal the required USB driver. To access the Windows driver the Samsung Kies application needs to be installed. This then gives access to the driver for the Galaxy Tab. Go to the Kies download page at http://www.samsung.com/uk/support/usefulsoftware/KIES/JSP. Click the Download For Windows button and save the file to a temporary directory (it is a large download so can take a few minutes depending on your connection speed). When the download is complete run it and Kies will be installed, by default to C:\Program Files\Samsung. In this directory there is a Kies folder which has a USB Driver folder, in which is found the program SAMSUNG_USB_Driver_for_Mobile_Phones.exe. This can be run on other computers to install the Galaxy Tab (GT-P1000) USB driver without needing to install all of Kies.
Here at Eye we do not use Kies to manage our Samsung devices. Instead a Virtual Machine (see VirtualBox.org) was used to get hold of SAMSUNG_USB_Driver_for_Mobile_Phones.exe then that was run to set up the driver.