RR, we will probably be joining you on Linux when W7 is no longer usable.
Propbeanie, I had a look in WU, did not see anything immediate that might have caused the problem, but I shall keep it in mind - thank ee.
Vienna, had a look at the links, the registry one was not there to fix, but I tootled up to the nvidia folder on C and saw that there was a setup in there for an older driver, so told that to go ahead and now the icon is back in taskbar and I can acces CP, so all seems sorted again. Thank you