Problem is that on 5 versions tested from different providers, they contains malware. Try uploading terminal.exe to virustotal.exe and see the results.
I have mt4 installer, that install new Metatrader 4 platform.
Attached here in zip archive
Its written here 2 or 3 post above
Go to the website of the broker you want and download the MT4 terminal from there.
When you want a MT4 platform from a specific broker, you don't start from the platform, but from the broker.
Please enable the necessary setting in your browser, otherwise you will not be able to log in.