Actually yes, I downloaded from electrum.org and I double checked to make sure it's not a nulled version.
But that's a weird default installation directory for Windows installer version:
C:/Program Files (x86)/ElectrummS3/electrum-e.3.3.4.exeElectrum will never use that directory nor folder name unless you named it like that.
Have you checked your browser's or internet options' proxy settings? Because some malware are able to set it (
even with AV) to redirect your browser to malicious sites like fake electrum sites.
I suggest to stop using it for now until you verified the signature.