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A few weeks back I installed a Canon WiFi printer, which caused all manner of issues with my laptop's COM ports (see - Cannot Delete Unwanted COM ports - Windows 7). Unfortunately by the time I realized the problem it was too late to perform a system restore so I had to manually remove the printer and registry entry.

Since then my laptop's performance on my home wireless network (the one where I also used the printer) has been very poor. Many websites take minutes to load or will not load at all and I cannot maintain a Skype conversation for very long. The strange thing is that connectivity to my work wireless network (which I use on the same machine for 8+ hours a day) is fine and other devices (my smartphone and partner's laptop) work fine with the home network (the printer wasn't installed on either of these devices).

I am running Windows 7 and have removed the network from both the 'network and sharing center' and registry with no luck. I've also run speedtest.net and upload and download speeds on the problem laptop are the same as the other devices in my home.

I'm out of ideas. It seems that some piece of software left over from the printer is affecting my home network connection, but I don't know how to discover or remove it.

Another point to note - the wireless for my apartment is provided with the rent and I cannot physically access the router.

Any suggestions welcome!

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I assume that somewhere in all that you rebooted your computer. What I would do next is reboot the router, but apparently that's not an option for you. –  Daniel R Hicks Mar 17 at 1:32
    
Yep, rebooted the computer after every step. The whole process described above was over a number of weeks. And no, can't get to the router unfortunately. Thanks though. –  Ad_S Mar 17 at 1:45
    
My guess would be that your nameserver setting is mucked up. –  Daniel R Hicks Mar 17 at 1:48
    
Sounds interesting, I've not heard of that. Any advice on how to go about diagnosis & repair? –  Ad_S Mar 17 at 2:09
    
You can try manually setting the DNS address. –  Daniel R Hicks Mar 17 at 3:03

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