[cadandcookies]

Sorry I didn't see this before.

Creo licenses are now pretty much exclusively on a yearly basis, similar to Solidworks, if I understand correctly. They don't really tell you this so it can be a bit confusing when the software "randomly" quits on you. Good news is you should be able to just register for anoher copy and input that new license code to take care of your issues. Run the setup.exe like you did originally, and use it to input the code to repair your installation.

Irrecoverable errors, by my understanding, tend to have two causes: not enough space, as you mentioned, or running something that interferes with installation while trying to install. If it's the former, try clearing out some hard drive space. If it's the latter, quit out of ALL running programs, including your web browser. You might also try rebooting your computer and then trying to install again (frankly, computers are far better at fixing themselves than us humans are).

Best of luck.