A desktop email client is a better place to keep a backup of your emails as you can use them offline as well as type and save emails to send later. There is a case where you may use few extra IDs to register at forums, websites, etc. But, what happen if you will forget one of your IDs which you have used long time back. Well, in that case you need to recover your password.
Microsoft has added a wonderful Windows repair tool to find a quick way out of Windows problems. This is actually a reverse gear, which you can use to alter any changes that might have incurred to the operating system due to faulty software or driver update, virus or malware attack, incompatible driver, or more. So don't forget to create Restore Point within a reasonable timeframe-say, the last couple of months to stay safe.