Uninstalling "crysis" on wild

I had the game "CRYSIS" (which is fine by the way) on my pc, and I could not uninstall it because it visibly lacked "windows installer": it is possible that I had deleted because I do not like things that are added when installing software (I was already pissed me crysis that creates a new user account on the PC to work).

Short, could not uninstall cleanly CRYSIS even trying to go through what seemed to be "windows installer" on the DVD of Crysis, I decided to remove it from my PC to the wild by removing the file CRYSIS in program files, then deleting the user account added, and eventually remove the remaining files after START-> SEARCH-> CRYSIS.

My question: Is there other files to remove potentially somewhere and how do I find?

And is it really annoying that I have "uninstalled" in this way?

You probably have lot of key in the registry that do nothing more. Possibly also the DLL in the system folder.

Never mind the principle of removing it as being part of the space on the hard drive lost and a bit of a mess in the registry

The asp.net account created is useless and can be deleted

Indeed, a program like Revo Uninstaller can be useful in some cases.

But back in the problem. You probably a malfunction of the service "Windows Installer".
Is it in a "started" in the management console of the computer?
What was the error message when uninstalling Crysis (too short itself incidentally).
As you have any difficulties with other installations / uninstalls?