Question:
The Setup I have downloaded has generated an error code. What does it mean? What to do?

Answer:
Please, make sure that you have downloaded the setup completely. If it says that installation is corrupt, it may be a good idea to re-download the setup to some separate folder and try installing again.

Important: Because of your cache settings or the cache settings of your provider, the incomplete setup may be cached and you might get it wrong even after re-downloading. Please clear your browser cache if this happens.

If you are re-installing or updating the software, please, close any running instances of the program you are re-installing/updating.

P.S. Error codes:

0 - Setup was completed successfully.
1 - Setup failed to initialize.
2 - The user clicked Cancel in the wizard before the actual installation started, or chose "No" on the opening "This will install..." message box.
3 - A fatal error occurred while preparing to move to the next installation phase (for example, from displaying the pre-installation wizard pages to the actual installation process). This should never happen except under the most unusual of circumstances, such as running out of memory or Windows resources.

4 - A fatal error occurred during the actual installation process. Note: Errors that cause an Abort-Retry-Ignore box to be displayed are not fatal errors. If the user chooses Abort at such a message box, exit code 5 will be returned.
5 - The user clicked Cancel during the actual installation process, or chose Abort at an Abort-Retry-Ignore box.
6 - The Setup process was forcefully terminated by the debugger (Run | Terminate was used in the IDE). Before returning an exit code of 1, 3, or 4, an error message explaining the problem will normally be displayed.
Any non-zero exit code indicates that Setup was not run to completion.