I have searched the event logs, and I can't find the source. I restarted the box last night at 2:00 am and it was running at 10% CPU utilization with 1009 processes running. It is currently (10 hours later, with no additional users logged on) running at 100% CPU with 8627 processes running.Look at the event log and see what is spawning those installers.
No, we don't use the Adobe creative cloud. The only Adobe product installed is Reader, and that wasn't running this morning between 2:00 and 11:00 amIs Adobe creative cloud installed on the workstations... That would be making copies of the individual library files and sending to the C drive
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There are, what appear to be, 1000's of msiexec log files, each of them is exactly 2bytes and empty.The windows installer service logs quite a bit of data to the Application log. I would image there is record of these installers. I would also look at the schedule tasks for something reoccurring. You can also use procexp to look at the details of the processes which would give you clues as to what they are.
Also you didn't run through my other suggestion from my last post. Get procexp and look at the running windows installer processes, specifically the commandline column they may give you an indicator to what the process is.