I don't want to run part of SEP, I love(d) the overall product and have been a loyal user for almost 10 years now. If uninstalling the Network Protection component didn't fix it, then I highly doubt installing everything except that will work either. The error message reads: Application and device control rule Autorun.inf_Read File has blocked explorer.exe trying to access autorun.inf. Autorun has been blocked. Check the Control log for more details.
I do believe that pertains to SEP, but I'm no guru. I'm currently downloading the SEPM but it is godawful slow and I find it a bit unnecessary to have a client manager for one system.