As suggested by a number of readers, I have gone back to basics and tried the "simple" approach. I connected the Dlink 4G router direct to an ethernet port on one of my machines, I simply disconnected the exist cat5 connector too my hub/switch and connected the Dlink. I tested the port prior to doing this and it worked OK and I still cannot get it (the Dlink) to work. ON switching on the device the Docs say the led that indicates a correct working Lan connction should come on steady and it does not, its flashing. If its cat5 cable is disconnected this led goes out and on reconnection comes back flashing. Three different cables were tried all behaved the same. Its unlikley that the DLink is faulty (allthough it cannot be completely ruled out), so for a "Simple" install there still must be some kind of custom config required. What actually is required for a simple direct on PC install, it appears standard eth0 setup does not work. Unfortunately when I restored the sim to my dongle and atarted windows I could NOT get an internet connection. After transfering the sim I tried my spare dongle this behaved the same way but worked correctly after it was "rebooted", what ever that does. Note: powering everything down did no good. I may get a router that will take dongles directly and see if a can get any more success. I may say this is P.....g me off no end currently particularly this comming directly after my main machines mother board failed. Note: I spent 30 years as a complex systems technician and such problems do not usually bother me but this is getting ....................... And not having a decent working internet connection is NOT helping AT ALL (as I cannot easily search for help). Lindsay