Thank you for such a prompt response.
I checked the drivers and quite a few, 12, did update on the chipset, and also the express controller, enhanced host controller. After doing this (over an hour) I rebooted as Windows instructed however it did not start. I left it on the HP Blue Screen (HPBS) and went to make tea, returned 5 mins later and saw a few Orange blinks on the case (hard disk activity) so I left it, the HPBS disappeared, black screen appeared with the blinking cursor top left.After half an hour the 4 blue paned window came up on the black screen, much hard disk activity for a few minutes and then the circle of dots appeared about 15 minutes later and spun round. The dots turned for about half an hour and finally the blue wireless adapter light on the case appeared followed by the Windows log in screen.
I don't have any Minidump files so decided to switch off. Bad idea as it would not reboot. Kept getting the HPBS and kept switching off and then on again 4 times which triggers the recovery partition , then a black screen, 4 paned windows, then circle of dots, then windows log on screen however all this takes about 15 minutes
I used powershell (admin) to configure automatic dumps and logged out and back in. I had a lot of bother to reboot as above only to find there were no dump files. Still have the same difficulty trying to boot up. I tried the sfc /scannow without a switch to fix any errors however it never found any integrity issues. I had done this myself about a week ago and never found any violation.
I looked at the Corrona site however I do not get a windows blue screen of death, just the HPBS which is stage 1 of a boot but I just hang rather than an actual crash. I just come to a halt before windows starts up. There are no bleeps from the mother board. Startup just halts.
If I look under "computer management" there are loads of log files but none are to do with booting or crashes, they are just routine events and stuff and audits which are all passes.
The computer runs fine, it regularly updates most days however it just will not boot up unless you trigger the recovery files on the hidden partition on the C drive. I'll do an "F2" interruption if you like to see where the PC is looking and the order when it needs to boot if you think that might help. It's as if it looks where there is no boot info to read and the only place it can be read is on the recovery partition