the server. You obtain these from the supplier ormanufacturer of the application.To install an application or software:1. To locate an installation file, select Menu > Ctrl.panel > App. mgr.. Alternatively, searchinstallation files using File manager, or open amessage in Messaging > Inbox that contains aninstallation file.2. In Application manager, select Options > Install.In other applications, to start the installation, selectthe installation file.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.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 applications andsoftwareSelect Menu > Ctrl. panel > App. mgr..Scroll to a software package, and select Options >Uninstall. Select Yes to confirm.If you remove software, you can only reinstall it if youhave the original software package or a full backup ofthe removed software package. If you remove asoftware package, you may no longer be able to opendocuments created with that software.If another software package depends on the softwarepackage that you removed, the other software packagemay stop working. For more information, see thedocumentation of the installed software package.Application managersettingsSelect Menu > Ctrl. panel > App. mgr..Select Options > Settings and from the following:• Software installation — Select whether Symbiansoftware that has no verified digital signature canbe installed.• Online certificate check — Check the onlinecertificates before installing an application.126 Security and data management