"The Clock" runs on any recent Windows based system, it is not recommended for any OS older than Windows 98SE (second edition).
Your PC or laptop needs about 60 MB of free disk space, and a minimum of 128 MB of RAM.
The graphics must be set to a minimum of 1024X768 (also known as 'XGA'). Anything less is not supported, anything more will mean that "The Clock" will work correctly, but will not fill the whole screen.
If you wish to show the clock display on a TV, big screen TV, plasma monitor, projection unit, etc. you will also need a video cable (S-Video or RCA, about $10-$30), or worst case a video converter (about $60-$150) that can handle 1024X768 (XGA). This will all depend on the inputs and outputs on your PC and on the TV. Some PCs have a built in video converter. Some of the higher priced video converters will let you 'stretch' the screen, so you can make the clock take up the whole screen, while also hiding the buttons along the bottom and the Windows frame at the top. Video converters are available at stores such as Best Buy, CompUSA and Fry's, or at online stores such as Tigerdirect.com (Here is one I like: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2180977&CatId=1430 )
An optional remote (which you can buy directly for about $50 from: http://www.x10.com/automation/x10_mk19a.htm ) requires an available serial port, but will also work with a USB to Serial port adapter (but it will not work with a PS2 to serial adapter).
“The Clock” Technical Specs