Can I get the initial IOS image preinstalled by Cisco?

[jaisol]

I'm a CCNA student. I didn't a backup of the initial IOS image preinstalled by Cisco into my router. As you can imagine I have changed once and again the IOS imagine configuration.

How can I get the initial IOS image preinstalled by Cisco?

I really appreciate any response. THANKS!

[jaisol]

I have tried with my CCO user accessing

http://www.cisco.com/warp/public/63/tool_links.shtml

(TAC Tools for Router and IOS Architecture Technologies) but my user have not authorized.

Some else suggestion. Please help ...