Windows 7 Mass Storage Controller Driver?

I have Windows 7 and in the 'device manager' I see 'Mass Storage Controller' which shows me a yellow sign of exclaimation & the following message pops up when 'right clicked' on 'properties' ;''The drivers for this device are not installed. (Code 28) There is no driver selected for the device information set or element.To find a driver for this device, click Update Driver''

Its not my hard drive as that is listed as ok under disc drives, so any ideas?

Bearing in mind that I am not as computer-savvy as the posters on this site, can anyone help with this problem?

In short, think of a mass storage device driver as that which enables utilization of an external hard drive, flash drive, iPod, et cetera as a place to store files. However, if you can access/transfer data without issue, you can generally ignore the alert. Nevertheless, I'd look for an updated Windows 7 driver from the computer manufacturer.

With a laptop I have found that the mass storage controller is usualy the card reader.

You may indeed need to install a driver for a card reader.

Your external drive's software
hasn't been installed on 7 yet. This is why you are seeing the yellow marked other device item in the DM there. You likely still have the factory Fat32 partition on as well.

You can try to right click on the item and select the uninstall option followed by a system
restart. That should see 7 reinstall the drivers from it's own driver base. In fact that would likely be the thing to try first if you already saw the installer menu appear initially. When going to install the beta you may have simply ran into an incomplete install where not everything went on well or something missing in the burn to disk.