Please scan the affected computers with one of the following anti-malware programs as they have been shown to clean recent strains of malware that resist detection by other programs.

MalwareBytes:
ComboFix:


Do not use Combofix unless administered by an expert. Simple mistake while using the tool can render your machine un-bootable. If you think your PC is infected, attach the logs in your next post as instructed here.

Regards,
Valinorum