Try running Windows update and see if that works. There seems to be a fairly consistant problem with SP3 in not allowing Windows Update to work properly, I suspect this similay. I don't know how to fix it, but at least this can help you find out what the problem is.
T61 15.4" T9300 (2.5GHz 6MB L2) Windows 7 Professional x64 4GB Memory, NVidia Quadro NVS 140M