But only machines that enable Remote Desktop Protocol (RDP) are at risk.

Read this post to lean this wormable Remote Desktop Services security flaw.

Thus, theoretically, attackers could scan the internet to find other machines to target.

Windows Virtual Desktop to Bring Multi-user Virtualization

This way can protect the remote computer from malicious software.

Windows XP and Windows 2003 users should either upgrade to newer releases or apply the security updates available viaKB4500705.