Photoshop :: How To Backup Adobe Software Activation

I have purchased Adobe Creative Suite CS6 for Windows and am using it on my desktop and notebook computer. This is the maximum number of computers I'm allowed to use it on. Since the software has an activation and deactivation feature and requires an internet connection, I assume that an activation on a third computer would not be possible. So I really have to make sure that I don't lose any of the two systems because I'd also lose one activation with it.
 
Today I've noticed that my notebook shows strange error messages. Applications were missing or would not start due to wrong reasons (not compatible with x64, although this was specifically the x64 version, and it's always worked fine). I ran a chkdsk and it fixed tons or filesystem errors. Now other programs are missing and I can't even install any new ones... Unfortunately I noticed the error while trying to perform a Windows system backup. That stupid thing deleted the old version and messed up the new one. So I haven't got any right now. There's also no system restore points, so I can only reinstall the system.
 
Don't worry, no user data is lost, but I'm kind of lucky that Photoshop still started and I could deactivate it before that wouldn't work anymore as well. (Computer systems often die slowly...)
 
So my question is: What files or registry keys do I need to copy to a safe location to backup Adobe's software activation on my computer? Would it be possible to restore such a backup on the very same hardware (maybe another disk drive in case the previous one died) but with a freshly installed Windows (same version)? I've learned several times that I cannot rely on a complete system image backup. The only backups that have ever worked 100% reliably for me were those where I copied files to a known location in a known format. But that doesn't include the activation I guess. I'd like to know where it is located so that I can perform a decent backup of it.