rtre
Suspect does not mean infected. Your computer is clean 
But is normal that rundll32.exe repeat until 7 times in my pc?
Update your avast virus definitions.
And, please, send the file to virus (at) avast (dot) com explaining about it. Hope the virus analysts could take a look.
Sorry but can you give me the link where I can do that? I don`t understand you
the exact thing happens to me as well, rundll32.exe is clean in virustotal.com (0/43).
i reported about that but no one seems to care about it.
it must be behaviour’s shield fault.
it can log rundll32.exe 5 times in 2 hours and it can find it 0 times in a day, itsnt consistent (something must be triggering the shield).