message that contains an installationfile.2 In Application manager, selectOptions > Install. In otherapplications, select the installationfile to start the installation.During installation, the devicedisplays information about theprogress of the installation. If youinstall an application without a digitalsignature or certification, the devicedisplays a warning. Continueinstallation only if you are sure of theorigin and contents of the application.To start an installed application, locatethe application in the menu, and select theapplication.To see which software packages areinstalled or removed and when, selectOptions > View log.Important: Your device can only supportone antivirus application. Having morethan one application with antivirusfunctionality could affect performanceand operation or cause the device to stopfunctioning.After you install applications to acompatible memory card, installation files(.sis, .sisx) remain in the device memory.The files may use large amounts ofmemory and prevent you from storingother files. To maintain sufficientmemory, use Nokia Ovi Suite to back upinstallation files to a compatible PC, thenuse the file manager to remove theinstallation files from the device memory.If the .sis file is a message attachment,delete the message from the Messaginginbox.Remove applications and softwareSelect > Applications >Installations > App. mgr..Scroll to a software package, and selectOptions > Uninstall. Select Yes toconfirm.If you remove software, you can onlyreinstall it if you have the originalsoftware package or a full backup of theremoved software package. If you removea software package, you may no longer beable to open documents created with thatsoftware.If another software package depends onthe software package that you removed,the other software package may stopworking. For more information, see thedocumentation of the installed softwarepackage.Application manager settingsSelect > Applications >Installations > App. mgr..Select Options > Settings and from thefollowing:Software installation — Select whetherSymbian software that has no verifieddigital signature can be installed.Online certificate check — Check theonline certificates before installing anapplication.Default web address — Set the defaultaddress used when checking onlinecertificates.Data management 75© 2010 Nokia. All rights reserved.