Attention, looks like someone wrote malware which uses the private message (PM) system of Unreal Software to spread itself. Maybe this malware also steals login data.

Unreal Software disabled PMs to stop the distribution of the malware.

Please check your Out-Box and Sent Messages

If you find messages which have not been written by yourself:

Scan your PC for viruses and malware
Quit suspicious processes
Change your UnrealSoftware.de password

NEVER EXECUTE ALIEN EXE FILES!