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you go to system settings, and go to internet, or, you can download the Nintendo dsi browser from the dsi store for free.
By default, a backup of the registry system is in My Documents. This can be changed in the system default settings.
system and registry settings
A registry file, or most would called it "Windows Registry" is a database that stores hardware, software settings and options of Microsoft Windows Operating System.
Restore your system using system restore to a previous date when your system worked perfectly or restore registry settings.
You can delete the internet connection settings in the Nintendo 3DS System Settings.
System Restore Point
System Restore Point
Download a program to do so. I recommend using Uniblue Registry Booster 2. Works great and you can also use it to optimize the registry also.
No single key stores all of the settings. Rather, all of the keys store most of your system settings. You will need to look up which key you need for a specific setting.
First, When your PS3 is connected to the internet the upgrade downloads are available at your settings menu. If it is possible take your PS3 to somewhere where you can connect to the internet and to a TV . Other wise I have added a Link for the 3.65 download and you can read the procedures with the download for the best information on how to install it to your PS3 it should be noted that If your PS3™ system software version is 3.65 (or later), you do not need to perform this update. To check the version of your system software, go to (Settings) > (System Settings) > [System Information]. The information is shown in the [System Software] field. I would look and see just how many updates you have missed before you install 3.65 and that was one of the reasons I suggested you take the PS3 somewhere there was an Internet connection.
System Settings>Internet>Connection Settings>Setup Complete>Connection Test. I hope this is what your trying to do ^^;