The actual speed is affected by many factors, including bandwidth you paid, distance, obstacles and so on; The SNR may not improve the speed.

Cause it happens occasionly, try to disable power saving mode and give it a go. https://www.tp-link.com/en/support/faq/2018/ Download link for the tpPLC utility....

Hey, it seems that you have some other companies' powerline adapters except TL-PA7020Pkit. The tpPLC utility can show up their own TP-Link products only....

Hey buddy, try to contact the tech support to get some help considering it is a specific edited product. https://www.tp-link.com/en/support/contact-technical-support/#Hotline-Support

Hey buddy, how did you setup parental control? Follow the instruction https://www.tp-link.com/en/support/faq/1531/ While if you want to cut off all the internet traffic immediately, why don't you...

how far away between the computer and router? What about the signal strength？ you may it move it closer to the router to get better signal; and you can change some wireless settings of main router,...