>>>HOW TO DISABLE INSTALLATION IN SYMBIAN PHONES AFTER BOOTING.

GOOD DAY TO YOU FRIEND, I HAVE CAME ACROSS THIS ISH MANY TIMES AND AM SURE MANY SYMBIAN USERS MUST HAVE COME ACROSS IT TOO. AND MOSTLY FROM THE COMMENT ON MY OLD BLOG I DECIDED TO BRING A SIMPLE SOLUTION TO IT.

LETS STARTED

1. HACK YOUR PHONE
2. APPLY OPEN4ALL TO HAVE ACCESS TO PRIVATE FOLDER
3. Open/launch a file manager such as X-plore or FExplorer. 
4.  Open your memory card{E:} folder and locate 'Private Folder'
5.   Next,Open the private folder & search until you find this»10202dce.
6.  On getting that,just delete the folder i.e10202dce.

7.  NOTE I DID NOT SAID YOU SHOULD DELETE THE ENTIRE PRIVATE FOLDER