Now Install Nokia Security Certificate For S40 Devices Easily...
Step 1: Download Nokia Software Updater. Which is about 40 mb in size..
Step 2: Install it into your Desktop ( pc )
Step3: Close all the application which is runninig in your PC. Include PC suit, Ovi Suite If its Running
Step4: Connect Your Handset Through USB cable to the Computer
Step5: Connect to Internet ( throug mobile or broadband ) (if you dont have broadband then need not to worry. through mobile you van connect to internet )
Step6: Run nokia updater, It automatically searches latest software for your device ( suppose your handset is already updated with the new firmware, then click on REINSTALL )
Step7: Download Software ( nearly 50 to 130 Mb, Depends on your avalable software your handset)
Step8: Install it.. thats it (It instals all security certificates even removes conflicted applications from your mobile )
Warning : It works and Do it with your Own Risk...
Step 9: If also not work then visit your nearest Nokia Care