Please use google translate if you cannot use english. Issue in English ''I use CCleader and yesterday I installed an update for ccleaner for two years.'' ''Unfortunately, when my laptop crashed, the invoice got lost.'' ''Incoming email ccleaner pro . Can you please find this invoice from CCLEANER (German) again?'' If you use CCLeaner then that's ok But never allow it to scan anything to do with Thunderbird nor anything in your profile folders as it is known to cause issues. Usually they are not to severe such as password or session data lost. Logon to webmail account via a browser and see if the email with invoice still exists on the server. If this a gmail account or a server that uses the gmail method - please check the 'All Mail' folder to see if email still exists in that folder - it may need the 'Inbox' label being reapplied to get it back into the Inbox. Was the lost email and invoice in an IMAP or Pop mail account or in 'Local Folders' account ?