Hi.
Sorry for delay....I tried uninstall and reinstall, re your first suggestion with my AV of and then on again ,I am running Norton internet security....no luck
I checked nortons firewall rules to see if it was blocked....full access
I then looked in the progdata file....there was nothing inside the malwarebytes folder
I disconnected from internet ran malwarebytes again because it could not connect to internet it ran full scan...all clear went back to programdata file loads of files inside including database file....ran update again still no look
Remembered I had old version on usb stick installed that, updated database ok and works fine (old version)
Will try your second suggestion in a few days if nothing changes
thank you for your help it is much appreciated