Nah, dunno what caused it - think it may well have been a bad sector on the SSD
Couldn't be arsed with the hassle yesterday so didn't touch it - switched it on this morning and it booted up fine......... then it froze when i went onto the net! Did a checkdisk (found and fixed some errors) then a startup repair and *touch wood* it seems to rectified itself
Have since done a major backup of important stuff
Nope but i have run into that one before with a flash drive plugged in, cue head scratching for 10 mins