application, remove the application, and install the application again from theoriginal installation file or the backup copy.The JAR file is required for installing Java applications. If it is missing, the devicemay ask you to download it. If there is no access point defined for the application,you are asked to select one. When you are downloading the JAR file, you may needto enter a user name and password to access the server. You obtain these from thesupplier or manufacturer of the application.To install an application or software, do the following:1 To locate an installation file, select Menu > Ctrl. panel > App. mgr. andInstallation files. Alternatively, search installation files using File manager, orselect Messaging > Inbox, and open a message that contains an installation file.2 In Application manager, select the application you want to install.During installation, the device shows information about the progress of theinstallation. If you install an application without a digital signature or certification,the device displays a warning. Continue installation only if you are sure of the originand contents of the application.To start an installed application, select the application. If the application does not havea default folder defined, it is installed in the Installations folder in the main menu.To see which software packages are installed or removed and when, select Options >View log.Important: Your device can only support one antivirus application. Having morethan one application with antivirus functionality could affect performance andoperation or cause the device to stop functioning.After you install applications to a compatible memory card, installation files (.sis, .sisx)remain in the device memory. The files may use large amounts of memory and preventyou from storing other files. To maintain sufficient memory, use Nokia PC Suite to backup installation files to a compatible PC, then use the file manager to remove theinstallation files from the device memory. If the .sis file is a message attachment, deletethe message from the Messaging inbox.Remove applications and softwareSelect Menu > Ctrl. panel > App. mgr..Scroll to a software package, and select Options > Uninstall. Select Yes to confirm.156 Security and data management