During installation, the device showsinformation about the progress of theinstallation. If you install an application withouta digital signature or certification, the devicedisplays a warning. Continue installation only ifyou are sure of the origin and contents of theapplication.To start an installed application, locate it in themenu, and select it. If the application does not havea default folder defined, it is installed in theApplications 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 tostop functioning.After you install applications to mass memory,installation files (.sis or .sisx) remain in the devicememory. The files may use large amounts ofmemory and prevent you from storing other files.To maintain sufficient memory, use Nokia NseriesPC Suite to back up installation files to a compatiblePC, then use the file manager to remove theinstallation files from the device memory. If the .sisfile is a message attachment, delete the messagefrom the Messaging inbox.See "File manager", p. 138.Remove applications andsoftwarePress , and select Applications > App. mgr..Scroll to a software package, and select Options >Remove. Select Yes to confirm.If you remove software, you can only reinstall it ifyou have the original software package or a fullbackup of the removed software package. If youremove a software package, you may no longer beable to open documents created with that software.If another software package depends on thesoftware package that you removed, the othersoftware package may stop working. Refer to thedocumentation of the installed software packagefor details.SettingsPress , and select Applications > App. mgr..Select Options > Settings and from the following:● Software installation — Select whetherSymbian software that has no verified digitalsignature can be installed.● Online certificate check — Select to check theonline certificates before installing anapplication.136 Applications folder