Re: Explorer.exe high memory usage
I would take a look and see if any other processes are spiking when you access that mapped drive. Also try disabling the AV and see if that makes a difference.
What happens when you access the share directly without mapping the drive?
Have you checked to see if there’s any hidden or system files?
How large is that one file in the directory?
BTW – SP3 is stable and is fine to install. It won’t be anything like SP2 was. I recommend updating to SP3.