2- If you have any security software installed, please turn it off for a while and then try.
[Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install or activate other software, you should re-enable it as soon as you're done.]
That also depends on the type of network environment you are. If its a secured network and restricted to access or do any file conversion online then it might be a problem for you.