This warning in the photo is just because you are downloading an .exe file from the UCOZ provider, it doesn't mean that it's a virus included is just an ad-annoying message, ignore it, the DreamIRC script is full-tested and it is clean.
The hashes are one of the most fast feature in the mIRC (cause of memory usage) this script is releated to them.
Now about the PnP try to enable disable any of
this setting in the UPnp box in the mIRC options -> Connect -> Options -> Ports and try to rejoin into the channels in order to see if you are still get Lag in 500+ channels.
- Thanks!
