On 6/28/2018 3:29 PM, Don P wrote:
Suggestions are requested for cause and cure of boot problems on an
IBM/Lenovo M52, running Win7 (updated) with a ViewSonic ViewSonic 2033
LED monitor, beginning about two weeks after replacing a (clicky) drive
C: with a Samsung 860 EVO SSD (with no problems at cloning and
installation.)
. . .
This pattern of failure to boot is new in the last two days, two weeks
after installing the SSD drive C.* I should be grateful if anyone knows
what causes this and how to prevent it.

Thank you to three contributors, whose suggestions were printed out and
filed away because the boot problem vanished after (say) 5 days. (Life
is too short to fret about curiosities that disappear.)
--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)