I have tried several ways to list the ReportingServicesService.exe as a process.
Seems to be the same type of issue we're experiencing. Are you using a Windows 2008 server (x86/x64) by any chance?!?
I started this thread: https://community.mcafee.com/thread/28551
Windows 2008 R2 with SQL2008 installed. Also another process I am having the issue with is DATABASEMAIL.exe. DatabaseMail90.exe. I'll keep you posted what I here from support.