I know this answer is unlikely to be what you're looking for but: Where are your backups? Things can (and do) go wrong at seemingly random times. It'd be a variation on the gambler's fallacy to think that the longer something went without issue the less likely it is to have problems going forward. With computer software, assuming the hardware remains in good working order, the probability of something going wrong is constant. It's the same on Day 1 as Day 5000. Just like it doesn't matter how many times you pull the lever on a one-arm bandit machine at a casino, every single pull has the exact same probability of winning. You could feed quarters (or whatever) into the machine all day long and your odds of winning never go up or down.
So statistics and probability lessons aside, why haven't you simply restored the backups you made of important files? Assuming the answer is you have no backups, why is that? Clearly your emails are important to you or you wouldn't be here asking about it, so why weren't they backed up? Maybe this will be a lesson for the future in the importance of backing up things you don't want to lose. Plenty of people have learned this by losing things more important than a few emails, so consider yourself lucky... Relatively speaking.
I turned on my computer and all my emails were deleted from Live Mail. I've used this for over 4 years and this has never happened before. Any advice?

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