The installer isn´t working.
And with the clean install it isn´t working too. It goes to 9-12 % and then comes something in French,
Does it still give the "Not a Valid Win32 Application" error?
'tis a bad download, then.
That means a portion of either the "lead-in" or "EOF" is being cut off.
Downloaded files have three parts:
Lead-in = ID's the file type, name, source and size.
The file itself = the data that makes up the download.
EOF - End Of File. Indicates that the download has successfully completed.
If the "Lead-in" is corrupted, your system doesn't know how much to download or when to stop downloading.
If the EOF doesn't download or is corrupted, Windows won't recongize the file as a complete download - hence the "Not a Valid Win32 Application" error.
Most common cause = Antivirus or firewall.
If ti happens even with a direct download like I linked to previously, something is corrupting it.
Try disabling your antivirus and redownloading the linked file(s).
Check the download size; the two installers that Mike linked to
install_flash_player_ax.exe is 16,889 KB (17,293,704 bytes);
install_flash_player.exe is 17,461 KB (17,879,432 bytes);
If you have different download sizes, then your downloads are corrupted. Download again.