Since the problem occurs both when downloading via GOG GALAXY and the browser, please make sure that the application and our domain www.gog.com is not being blocked by your anti-virus or firewall software. You can try disabling the security software for the duration of the installation or adding both the application and our domain to your software's trust list.

If it doesn't help, we would need to investigate it a little bit deeper, so please contact us via this form.