I bought a new laptop and I cannot get my brother mfc-6490cw to print wirelessly

perform head cleaning and flushing

Ensure you have properly installed the communication between the printer and the hub and only then install the relevant software to windows. It appears that something has not properly being installed.

You have 2 printers because it was inadvertently installed twice. You need to un-install both of them and reinstall the printer again.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

No, that model does not print Double Sided (Duplex). You can see all the features and specifications here: http://www.brother-usa.com/mfc/modeldetail.aspx?productid=mfc6490cw

go to Brother International - Support for your Brother Product.

check if Grey scale printing option is enable.

Having the same issue with 6490CW and Uverse internet. It connected just fine to my wireless when I had AT&T DSL. Well, just fine is an overstatement, it would constantly go "offline" and need to be re-connected but at least it printed fine when it was. Now, I switched to Uverse and it WILL NOT connect wirelessly. I went the cabled ethernet route and it STILL has tons of issues recognizing the printer and printing, often stopping mid print and spitting out a half printed page or just not printing at all and telling me the printer is turned off. Next step is to try connecting with a straight up USB connection, bypassing the network completely. I feel like that's my only option short of getting a new printer. Brother's software simply does not work with some networks it seems. I guess it has issues with FIOS as well. This does not surprise me and it is also not surprising that Brother has not updated the drivers for my printer since 2009. Pretty ridiculous since things have changed a lot on the technology front in almost 4 years.

If it's under warranty you're in luck, you need a new printhead,LK3197001, around $80.00. I just replaced one yesterday in the shop for the same problem. I would call Brother customer service and see if they'll help cover the cost.
1-800-276-7746

theres a menu button on the wireless printer..go to network and set the configuration from there if your using wireless just set the configuration to the existing wireless device you have and thats it...instant wireless printer connection...also check the manual..hope this helps...