Some more useful info to disseminate into interweb.......
Many older Epson scanners and their drivers don't work in Windows 7 and its 64bit architecture.
Epson are useless at getting all their products up to speed, only the newer, more popular models are currently supported.
My scanner the GT-8200UF was not supported by Epson. I found a easy workaround. Vuescan - a scanning software which is the software I use anyway as it's excellent scanning software, far superior to any of the junk that most manufacturers bundle with their products.
Vuescan made by Hamrick, can use its own drivers to enable your scanner to work.
..and it works perfectly, thank you Hamrick and Vuescan.