|I doubt anyone will be able to give you a concrete answer - I've seen problems come and go on computers before leaving you with no clue how they apparently fixed themselves. |
Another possibility is that when you have an issue a certain amount of data can get stuck in the mobo chips (sometimes called flea power, although I've no idea why). If the computer was turned off for a while maybe something discharged away and was therefore not present when you next booted. For some oddball reason this is called flea power. See this link, which also gives info on how to discharge this residual power fully. It sounds like a fairy tale but it definitely can happen, especially when something like a Windows update gets in a loop:
EDIT: Removed my wordy explanation and provided a link instead.
Always pop back and let us know the outcome - thanks
message edited by Derek