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#11
Typically behavior like that is due to a service running, and it will usually show up in eventiewer as an application error. If it didn't, the best method to find out which service is slowing things down is to run through the clean startup and add each service one at a time to the startup items to determine which causes issues. My antivirus causes issues like this occasionally, but it shows up as an error in eventviewer with an application fault due to the "svc" string filename. I know Bonjour is a known service in iTunes that can cause slowdowns, as well.