Windows broken

broken Windows. I need to reinstall.
Now I have access to the files on the system disk.

I want to reinstall Windows.
How to install the Em client?  In order not to lose access to the old emails

Hello Roman, if your computer crashed, you can restore your database by copying the database from your old local user/AppData/Roaming folder onto your new installation, however note this is not officially supported way of restoring your data as during events like this, database may already be corrupt.

To restore your previous database you should always use a valid backup file created by the eM Client database backup tool.