details. Control the use of digital certificates inCertificate Management.● If you install a file that contains an update or repairto an existing application, you can only restore theoriginal application if you have the originalinstallation file or a full backup copy of the removedsoftware package. To restore the originalapplication, remove the application, and install theapplication again from the original installation fileor the backup copy.The JAR file is required for installing Javaapplications. If it is missing, the device may ask youto download it. If there is no access point definedfor the application, you are asked to select one.To install an application, do the following:1. To locate an installation file, select Menu >Settings and Application mgr.. Alternatively,search installation files using File manager, orselect Messaging > Inbox, and open a messagethat contains an installation file.2. In Application Manager, select Options > Install.In other applications, select the installation file tostart the installation.During installation, the device shows informationabout the progress of the installation. If you installan application without a digital signature orcertification, the device displays a warning.Continue installation only if you are sure of theorigin and contents of the application.To start an installed application, locate the applicationin the menu, and select the application. If theapplication does not have a default folder defined, it isinstalled in the Installed apps. folder in the main menu.To see which software packages are installed orremoved and when, select Options > View log.Important: Your device can only support oneantivirus application. Having more than oneapplication with antivirus functionality could affectperformance and operation or cause the device to stopfunctioning.After you install applications to a compatible memorycard, installation files (.sis, .sisx) remain in the devicememory. The files may use large amounts of memoryand prevent you from storing other files. To maintainsufficient memory, use Nokia Ovi Suite to back upinstallation files to a compatible PC, then use the filemanager to remove the installation files from thedevice memory.If the .sis file is a message attachment,delete the message from the Messaging inbox.Remove applicationsSelect Menu > Settings and Application mgr..To remove a software package, select Installedapps. > Options > Uninstall. Select Yes to confirm.144 Settings