A few days ago, I posted a thread about my computer's high CPU usage, and the theory was that it was related to a hanging update problem. People pointed me in the direction of my svchost process taking up an unnecessarily high level of CPU. But going through the checks, it didn't look like I lacked any of the updates that would be stalling. I looked at the processes, and the one taking the most CPU was located in my temp folder, rather than my system folder, and the date revealed that it had been created when I logged on. I deleted it and everything went smooth, and when I rebooted my computer, it re-created itself.
I've since ran scans with avira, spybot s&d, and tdsskiller, and nothing seems to detect any threats. What should I do?