====== Restore of installation from a backup ======
<WRAP round tip 90%>
Use this procedure if you lost your original installation.
</WRAP>

<WRAP round important 90%>
Within the organization, only one //T3C Service// node can be installed for data consistency and communication with the //T3C Server//. If you need to install multiple nodes, install //T3C Service// on a server computer and //T3C Consoles// on other computers.
</WRAP>

<WRAP round important 90%>
Due to the compatibility of the transferred data between T3C clients, it is not possible to use an older version of the application than the one you have already used.
</WRAP>
===== What you need =====
  * [[download|The current T3C installer]]
  * Backup, which must contain at least //pk.pem// and //main.conf// files
  * Passphrase for private key, if it is secured
  * Administrator privileges for //Microsoft Windows// operating system

===== Procedure =====
  * Please follow the instructions for a [[newInstallationWithExistingRegistration | new installation with registration from backup]] up to the step where the existing registration is applied
  * The next steps depend on what version of the data you have in the backup. If you don't know, identify it by opening the //main.conf// file and reading the //data.version// field

==== Backup since version 12 ====
  * If you have a full backup, i.e. folder //Service//, copy it to the folder //%ProgramData%\TatraMed Software\T3C//
  * If you only have a configuration backup, i.e. folder //conf//, copy it to the folder //%ProgramData%\TatraMed Software\T3C\Service//
  * Make sure that //main.conf// and //pk.pem// files have been copied to the //conf// folder
==== Backup of version older than 12 ===
  * Copy the data from the backup to the folder where you installed T3C (the default folder is //% ProgramFiles (x86)%\TatraMed Software\T3C\Service//). Do not overwrite any binaries that are already in the destination folder
  * Make sure that //main.conf// and //pk.pem// files have been copied to the //conf// folder
==== Continue ====
  * Now it is necessary to run the installer again, because it is necessary to convert the data to the new format. Choose to install all components
  * If the private key is protected by an authorization phrase, the installer will ask for it
  * In the final step of the installation, a data transformation is performed. If there are any errors, please follow [[troubleshootingMigration|this procedure]]
  * [[checkInstallation|Please verify the T3C functionality]]

<WRAP round tip 90%>
After successful installation, please [[backupconfiguration|back up the updated configuration and private key]].
</WRAP>

~~DISCUSSION:off~~