After installing Autocad LT 2013 on windows 7 Pro 32 bit, I recieved an error that indicated:
FATAL ERROR: Unhandled e0434352h at address 75c8D36fh
customization file I/O error
After clicking through the numerous Unhandled error windows the App closed out.
After trying unsuccessfully changing permissions to MS .Net framwork 2.0 and 4.0 machine.config and
allowing user to have either power user or local admin rights I approcahed the situation differently.
I removed all Autocad LT 2013 instances from program and features.
I also removed all instances of MS .Net framwork which was 4.0 and the extended.
Please note that MS 3.5 Framework is bundled into the Win 7 OS, to be excluded (it does not get removed) from the OS it has to be deselected from Windows Components in Program and Features.
Reboot of course after doing all of the above mentioned procedure, then reinstall Autocad LT 2013, it will reinstall its version components of MS Framework.
The App will then function as it should, it did for me. I am on a domain environment MS updates did not affect the standalone install.
-Ron