Constant pop-up warnings showing that the computer's virtual memory is low are a suspicious symptom.
The virus will automatically eat RAM as it spreads to the computer's executable files.
The operating system (OS) may reply with a pop-up message as the computer's available, unused RAM shrinks.
Depending on the type of multipartite virus, the infected computer's hard disk may be reformatted automatically.
This is done in an attempt to defeat anti-virus software and other traditional malware security measures.
The multipartite virus may reformat the computer's hard drive to reinfect it even if anti-malware software removes the infestation.
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