Hi Thank you for your very prompt reply inquiring if all went well with the fix.
Unfortunately on start up today I still have the same problem that the Samsung fires up quickly then I get the windows welcome screen asking for my password , on entering the password the little round revolving icon shows and then fades away as the screen black screen with the white arrow cursor hangs, although during this time I able to move the white arrow cursor around, then after a minute or so the black screen fades and my normal windows desktop opens up.
I have Kaspersky Total security with security Cloud software installed,although I have tried turning that off and the black screen problem still remained, I thought as the Security cloud take s a while to launch that may be the problem, although when this software was initially installed it didn't appear to cause the computer to go to a black screen during the cloud modules update.
Could it be anything to do with windows security update KB915597, although according to Microsoft once installed this cannot be removed or disabled.
I have checked the health of the Samsung SSD with the Samsung magician and the computer memory with diagnostics , both tested good.
Once again thank you for your help.