Originally Posted by
Matrix Leader Mirror is just another link to download the OS incase you are not able to download it from the first link posted.
If you backup using the BlackBerry Manager, you will be safe.
The installer of the OS automatically backs up your settings, contants, emails, etc. But should anything go wrong. you have the backup so you can always restore it within a minute easily with the BlackBery Desktop Manager :)
Here are some basic instructions for your.
First back up
then download the OS
then
1) Install the *.exe file you just downloaded.
2) Navigate to Computer >>> C: >>> Program Files >>> Common Files >>> Research in Motion >>> Apploader
OR to Computer >>> C: >>> Program Files (x86) >>> Common Files >>> Research in Motion >>> Apploader (if you have a 64-Bit Windows Operating System)
3) Delete the file named vendor.xml
4) Connect your BlackBerry through the USB port
5) Run loader.exe
6) Follow the on-screen instructions and enjoy.
When you click NEXT after the last step, you will get a list of components that you can check or uncheck. Ensure you do not touch anything you don't know of. Also, uncheck anything you definately won't be using.
Example, no need to install all the Instant Messaging Clients such as Yahoo Messneger, Windows Live Messenger, Facebook, etc. Only install the onest you actually use to save the precious memory on your BlackBerry Device.