|"I have a wireless connection with excellent signal (full bars)"|
The bars indicate the strength of the wireless network connection to whatever it's connected to wirelessly - in most cases that's your own router or combo router / high speed modem. The signal strength must be adequate, but that does not indicate whether the internet connection is good or bad.
Wireless B or G, or Wireless N ?
As in, what do both ends of the connection support - e.g. if you have a Wireless N adapter but are connecting to a router that supports only wireless B / G, the connection is at best wireless G.
Wireless B and G are a LOT less reliable than a wired network connection, even when your signal strength is good. .
The max data transfer speeds.
Modems and network related devices, and usb and firewire devices, are rated in bits per second, not bytes per second.
You divide the rate in bits per second by about 10 to get the approx. max rate in bytes per second - 8 bits per byte, plus about 2 bits per byte for "overhead" not related to the data you end up withj
Wireless G has a max speed of 54 mbits per second.
A 10/100 wired connection has a max speed of 100 mbits per second
A 10/100 /1000 wired connection has a max speed of 1000 mbits per second (1 gigabit per second).
Whether the max network adapter data transfer speed is adequate depends on the max internet connection speed the internet package you bought supports.
A wireless G connection may be adequate, it may not be. You never get the theoretical max data transfer speed in any case.
A wireless N connection is much better than Wireless B / G connection, but it's not as reliable as a network cable connection, whether it's a 10/100mbps connection or a 10/100/1000mbps (gigabit) connection.
See response 2
- try restarting the modem or combo router/modem - that can be especially helpful if you have a DSL or ADSL connection
- connect a network cable to your router if it's close enough if that applies (and disable your wireless adapter, e.g. in Device Manager. You can only connect to the internet via a wired or wireless network adapter at any one time. If you don't disable the wireless adapter, the computer will still be connected to the intertnet wirelessly when the network cable is installed).
NOTE that high speed modems usually DO NOT auto reset themselves to a higher max speed after it has become poor after whatever problem that caused that has gone away - you must restart the modem to get your max possible speed !
It's not likely changing TCP settings is going to cure you problem on their own.
Default TCP settings in Windows are not ideal, but you have to know what you're doing when you change TCP related settings otherwise you can make the internet connection perform worse.
There are lots of programs out there that do a good job of changing TCP settings for you.
I use this one.
Search for: TCPOptimizer, download it, install it, run it.
Choose the network adapter / type you're using, click on Optimal settings.
It makes a backup of previous settings if you want to go back to those, but I've never had to.
The TCP settings changes it makes "stick" until Windows is loaded from scratch, which uses default TCP settings.
It only runs when you run it yourself. It has nothing that runs all the time once it has been installed.
For a better indication of what your internet connection speed is, when you want to check that at any particular time, or if you want to check the effect of changing TCP settings has done at the same site within a short time for comparison.......
Go to a web site where you can test your max internet connection speed.
Use the same web site, the same test, the same server if you are comparing to previous results.
E.g. In my case I use this site's internet connection speed test:
with a server chosen in Canada that gives me the highest results.
The results of any speed test will vary depending on which web site you go to, which server you choose, what is between your computer and that server, and how busy that server is at the time you do the test.
If you run the same test within a very short time, the results of the subsequent tests are usually falsely higher because part of the data that was downoaded for the test is still on your computer. If you want to do the same test(s) within a short time, do something else between the tests to clear data the test uses that may still be on your computer.
In my case with my ADSL connection, when there is too much electric and electronic noise being picked up on the ~52 year old phone line between my location and the nearest telephone exchange, the max speed is poor.
When that is not a problem, it's ~ what the ISP says it's supposed to be for my internet package.