Windows Vista - http://www.vistaarticles.com
The software for this device has been blocked from starting because it is known to have problems with Windows. Contact the hardware vendor for a new driver. (Code 48)
http://www.vistaarticles.com/articles/508/1/The-software-for-this-device-has-been-blocked-from-starting-because-it-is-known-to-have-problems-with-Windows.-Contact-the-hardware-vendor-for-a-new-driver.-%28Code-48%29
By 
Published on 11/16/2007
 
The software for this device has been blocked from starting because it is known to have problems with Windows. Contact the hardware vendor for a new driver. (Code 48)

The software for this device has been blocked from starting. (Code 48)
Obtain and install a new or updated driver from the hardware vendor.