Under Windows Server 2008 and Windows Server 2012, new installed applications are not allowed to comunicate through the Firewall. To download firmware with Osloader, you have to authorize Osloader application to communicate through the Firewall.
How to allow Osloader to communicate through Windows Firewall
To allow Osloader to communicate through Windows Firewall:
NOTE: If Osloader doesn’t appear in the list of applications that are allowed, click on then Allow another app... button and select Osloader in the list, check the check box and reboot the PC.