Ragnor: Ah your pc is connected to the router via wireless not a network cable?

Use this program, fixes a few common lag spike issues on Windows
http://www.martin-majowski.de/wlanoptimizer/

webwat: And check for wireless congestion, maybe experiment with different channels. Try switching from channel 11 to 6 and see if it improves. But yes obviously using the a Cat5 cable means you dont have to share the airwaves with your neighbours and your own microwave or cordless phone.

awesomealvin:

webwat: And check for wireless congestion, maybe experiment with different channels. Try switching from channel 11 to 6 and see if it improves. But yes obviously using the a Cat5 cable means you dont have to share the airwaves with your neighbours and your own microwave or cordless phone.

And how do I switch channels??

dontpanic42:

awesomealvin:

webwat: And check for wireless congestion, maybe experiment with different channels. Try switching from channel 11 to 6 and see if it improves. But yes obviously using the a Cat5 cable means you dont have to share the airwaves with your neighbours and your own microwave or cordless phone.

And how do I switch channels??

So are you running on a wired connection now?

If not,
Try this application: http://www.metageek.net/products/inssider/

Have a look at what channel your wireless network is on. If there are quite a few other wireless networks around you, and if you are on a channel that is overlapping with the other networks, you would be best to change to a free channel band.

You can change the channel in the wireless router's web based menu.
What type of router is it? i.e. Brand/model number?

awesomealvin:

The 97C7DB is the model number.
Thomson is the brand.

dontpanic42:

awesomealvin:

The 97C7DB is the model number.
Thomson is the brand.

I'd say your router is actually a Thomson TG585v7 or v8. The six digits you gave are to uniquely identify your router's wireless SSID (network name), and are based on the last 6 digits of the MAC address of your router, preceded by 'Thompson'.
In any case, if you can only see one wireless network on inSSIDer, then the wireless channel you are on is unlikely to be the issue.

It may be an overall 2.4GHz interference problem like many have already suggested.
I believe the TG585v8 routers are Wireless N capable. I'm not sure if they are 5GHz capable however. Changing to the 5GHz band may help the situation. Can anyone confirm this?

To get into the router's menu, open up your internet browser and type in http://192.168.1.254 (or click this handy link :) )
Have a look around and see if you can find the modem's line stats (i.e. line attenuation, noise margin etc...). Post them up here. I can't remember how it is labelled on that modem, but just follow your nose.

Like many have already asked, have you tried using a Cat5/6 Ethernet cable to connect to your router?

Bandwidth (Up/Down) [kbps/kbps]:
924 / 13.495

dontpanic42: Your line stats don't look too bad. However, your bandwidth is definitely on the low side given your line stats.
Have you checked with your ISP account to see that you haven't been reduced to dial-up speed (64kbps) because you have gone over your data allowance?

It's also very odd to note that your Download speed seems to be less than your Upload speed. I'm not sure why that would be, but it seems quite weird.

Or maybe I'm just reading the stats wrong?

Bandwidth (Up/Down) [kbps/kbps]:
924 / 13.495

924 could mean 924kbps
and
13.495 could mean 13.495Mbps

Ragnor: Yeah try plug in via network cable and test it out.

You need to do this to determine whether it's just wireless that has this issue or is the router in general (or perhaps ISP issue).