Network slowdown
 

I wonder if anyone can answer this...


For some reason every now and then my network slows to a crawl, there's 3 PCs, a Laser Printer, an A3 colour printer, a tablet and 3 phones attached.

When trying to access files its so slow u sometimes get not responding when attempting to open files, now i thought it was the router i switched back from my ASUS RTAC87u to my old 66u and low and behold within a few days bang it happens again.

Once i reset the router all is fine again, it could last a day, a week or 2 weeks but suddenly bang and i don't know the cause, anyone answer this?