Help! How to clean the computer from all deleted emails and storages?

First, you should be aware that email which you access from a web browser is NOT stored anywhere on your computer. Emails are only ever stored on your PC if you download them using Outlook or Thunderbird or some other email client. You can easily clean up cookies and temporary files by using CCleaner or similar software. This can delete all of your browser history and any temporary files. There is also an option to overwrite deleted files so that they are no longer readable. It sounds as if this is the kind of tool you are looking for. CCleaner has a free version and can be downloaded here: http://www.piriform.com/ccleaner/download

Are you talking about the emails from lotus notes or other sites like yahoo/gmaile etc. please clarify.

I would suggest you to clear the history and also change the passwords once in a while so that nobody can guess your passwords.

I read all the responses, they are useful, when i close my pc or laptop, i run Advance window cleaner Personal, it deletes history and restores space, it is free you can download and install.

All the above advice are all insightful...don't forget to log out if use pc in internet cafe...some people would surely make a mess of your email if you forgot to log out...try to change your password make it alphanumeric...but don't forget it, try to have second option for recovery...

if you are prepared to reinstall you computer then you can perform a full format of the hard disk, and then reinstall windows. but if you kept you emails set to download to another hdd then you could format that hard disk without having to reinstall your computer. generally your email client should have a delete function even if you have to do it manually. if you can find where the emails are stored then you could also delete them from there and then empty the recycle bin which will mean that they are permanently removed from your computer. hope this helps.