Thanks Lizzie, Now for chapter 2 (and I hope final) chapter of this update saga. After around 75 minutes I managed to get the computer to boot up (through bios) and had a decent though curtailed session apart from Firefox not responding again! Now sheduled for execution shortly!
When I switched off the updates were there again, 19 of them this time, one has fallen by the wayside.There being no way to switch off without installation in W7 I bit the bullet, switched, went to Sainsbury's and got wet!! On return I switched on again and guess what went through the same rigmarole again except that this time after the restart in the middle the computer booted up OK (

) No doubt something lurks in cyberspace waiting for me. Next step to go into Windows update and tailor it to my requirements which if possible will be security only, and manual download. That reminds me is microsoft updates department staffed by Manuel and other migrants from Fawlty Towers?