I think I have finally got somewhere, I found an answer on Microsoft support an item about setup unable to configure on this computers hardware. As I suspected it is the Intel software needing updating to allow windows 7 to install. Not a problem if service pack 1 is installed. See kb/2466753  Need to download & install on removeable drive & install as part of windows 7 clean install.  Now just got to install all my stuff. fingers crossed certainly windows updates have started installing.
Not sure if this is the correct Forum? PC is Precision T5500 O/S is Windows 7 Pro I have tried many online forums incl Microsoft. Problem seems to be caused by 'Cryptographic Services failed to initialise The Catalog Database.' The ESENT Error was 583. I am 'second user' of this machine & do not have any backup disk or Repair partition. All online suggestions have failed & various repair programs, Regcure etc have not worked. I am considering  Reinstalling Windows Pro but only have an OEM disk from another machine can I do this & use the Product ID from this machine. Machine was purchased from a supplier in Germany but has Dell warranty from UK expiring next month. Product Tag is .  Any suggestions or thoughts please
Cannot run Windows update or any troubleshooters