Also could be that something is connecting to the router on 802.11g and that may drop the router down to that standard as the maximum (seem to remember that happens on some routers).

Need to check the wireless device fairly close to the router to check max speed - if still 54Mbps then also need to check all setting on router and network cards to ensure everything is set for the maximum speeds (turning off support for 802.11b/g may help force it to a better standard).

In reply to a post by MrSaffron:

Receive rate (Mbps) : 54
Transmit rate (Mbps) : 54

This is your issue, the wireless devices are only connecting at 54 Mbps. What actual make and model have you purchased? Compatibility with the various wireless standards can be variable and you may find your wireless dongles/card are less than optimal.

I'll add a reminder for the OP that, where the properties show a link rate of 54Mbps each direction, the actual throughput that can likely be achieved is only around 22Mbps.

And that only happens when no neighbouring networks are actively consuming some of the time for their throughput.

In reply to a post by bonnyjars:

I do not know where to find that

in Windows... WIFI status shows
IPv4 connectivity :internet
IPV6 connectivity:No network access
...
...
Speed 144.4Mbps

According to this Q/A, a link rate of 144.4Mbps means that your 802.11n hardware is properly connecting in MIMO mode (2 transmitters/2 receivers). However, you are only using a channel width of 20MHz - which is the standard width of a WiFi channel.

Even so, you ought to be able to achieve throughput speeds of around 50-60Mbps on this setup - less, as you move further away, or get interference.

If you want to get a link rate of 300Mbps out of the system, you will need to make sure that the access point (your VM router?) has a wifi configuration that enables 40MHz operation.

Unfortunately, 40MHz operation comes with its own problems - including an increased likelihood of interference with neighbours at 2.4GHz - so is perhaps best left for 5GHz radios.