Disappearing accounts from a metatrader platform???

Just looking for general advice as I have a laptop with issues.  I reopened metatrader to find a chart profile missing (or maybe old) and previous accounts set up to monitor VPS.  Now I know I can just re-add the accounts (they are still LIVE), but what could of happened to metatrader data for this to have happended?  Any input welcomed as I don't wish for this to happen again.  thanks Forum