I actually don't think its the the anti malware but this is the only new stuff that I can recall, other than that it worked with my win firewall (electrum is in whitelist) and avast.
I'm not sure what the problem is then.
You could try deleting the blockchain_headers file in your installed electrum wallet.
Copy this line of text.
%appdata%\Electrum
Click the windows start button, then paste the line of text into the search box that appears, then press your enter key to open the folder containing your electrum wallet's blockchain_headers file.
This is what the search box should look like after pasting the line of text into it.
Delete the blockchain_headers file, then start electrum and check if it syncs.