Like to say thanks for the replies and sorry for not getting back sooner, but got called away with work.
I did try to download the system update tool, but unfortunately the T42 does not have Microsoft Net Framework installed and was unable to install it from disc, as I got a message "cannot connect to server".
Have gone back to the Lenovo site and downloaded the drivers again and made sure I run the setup.exe. But still no joy! So maybe a hardware problem, as suggested?
The T42 model is series 2373 K1G
The Error Code in device manager is Code 28
Driver Details as follows.
? Biometric Coprocessor USB\VID_0483&PID_2016\&1C077785&0&2
? Ethernet Controller PCI\VEN_8086&DEV_101E&SUBSYS_05491014&REV_03\4&39A85202
? Multimedia Audio Controller PCI\VEN_8086&DEV_24C5&SUBSYS_05371014&REV_01\3&61AAA01&0&FD
? Network Controller PCI\VEN_8086&DEV_1043&SUBSYS_25518086&REV_04\4&39A85202&0&1OFO
? PCI Modem PCI\VEN_8086&DEV_24C6&SUBSYS_055A1014&REV_01\3&61AAA01&O&FE
? Unknown Device ACPI\IBM0068\5&2890D699&O
? Video Controller (VGA Compatible) PCI\VEN_1002&DEV_4C57&SUBSYS_0530104&REV_oo\4&1BFA44D4&O&OOO8
Hope this information is of more help.
No problems with buying the CD's DVD's if needed from Market place, but will see what response I get first. Also if it is a hardware problem, could you let me know exactly what would need replacing?
Sorry for the long post and thanks again for your help with this.