Just in case anyone else has experienced the same frustrating problem as me, I thought I'd share this info.
I have an excellent high resolution Canon flatbed scanner that I bought in 2004 or 2005. I used it for many years for all my general scanning work, and it also does colour slides (5 at a time), and colour negatives and B&W negatives in strips. It handles 35mm slides and film as well as some of the older larger formats. A brilliant pieces of equipment. It came bundled with Photoshop Elements and worked with that to do the photo scanning, colour correction, and image repair work.
Unfortunately, when I replaced my laptop a couple of years ago and shifted from Windows 7 (32 bit) to Windows 7 (64 bit), the appropriate drivers were not available. I have not been able to use it since and I've been reluctant to buy a new one as they are expensive ... and there is nothing wrong with the old one. I just kept searching periodically for an updated driver.
Well I finally found one here: www.hamrick.com/ It's called VueScan and it is designed specifically to solve this problem. You buy it, download it, install it, and start up your old scanner. VueScan recognizes it and away you go. It works with 3,000 different scanners and is designed to replace the software that came bundled with the scanner, and to bring perfectly good old scanners back into service. So far, I'm very impressed.
Yup, got it! It even works with my circa 1996 Epson SCSI scanner, and even better with my Nikon SCSI slide scanner. Even better, it can take almost totally faded 60 year old color slides and restore a very convincing color to them.