Attention, there is a new kind of virus spreading in the environment of 3Ds Max, which can not be detected by your antivirus software!
Have You seen these weird "helpers" in Your scene? If so- You have been infected.
If your scene is infected or you want to avoid getting the virus into your 3Ds Max download and install share-ware script Prune Scene
(alternative solution in the bottom of the post) and activate the Active Protection!
More info on how to find a virus and what it does can be found here
The Autodesk Knowldge Network has troubleshooting articles on how to neutralize the CRP and ALC misbehaving scripts, clean your max scene files and your 3ds Max environment of them.
- AKN CRP article
- AKN ALC Article
Autodesk released their 3DS Max Security Tools which is available free of charge from the Autodesk App Store