Bottlenecking/Skipping Connection

Since i got my new computer (quite a while ago) ive been experiencing skipping and jumping in the connection. This is mostly while playing games, it might happen while i am browsing on the internet, not sure though.
I am using a really old wireless adapter, i dont even know whats its name or model number is, i just know its made by inventel. I have a couple of other computers, is there a website that i can use to run a test or something to check my conection or or does anyone know what is causing my problem. If you need anymore information please ask.

Thanks

its a combination of probably a high ping and or packet loss on your connection.

http://www.speedtest.net/ to test your ping and connection speeds,

do you use teamspeak? if you do right click your name once you've been connected for a while and select connection properties (or something like that) and it will show you your ping and packet loss %

really anything over 5% is really annoying.

hopefully its just something like a high ping, and that can be eased by selecting servers closer to you on the net, or i believe you can call your isp and have a moan (im sure someone else can give you more details on that)