I received an email from my internet service provider saying I had used 75% of my data, which is unusual for me since I typically only use 5-15GB daily. Upon checking, I found that I had used nearly 2TB of data in a week, which started right after an area-wide outage was fixed. I've pinpointed my laptop as the source of the data usage despite it being in sleep mode the entire time. I've contacted my ISP, reset my modem and router, changed passwords, and monitored my devices, but I want to know why my laptop was consuming so much data while seemingly inactive. Is it possible that the ISP outage is related, and how can I find out what's causing the data spike on my laptop?
3 Answers
It's also possible your laptop is set to run background updates while in sleep mode. Check your settings to see if there's an option to disable updates during sleep. If you didn’t adjust those settings after the outage, they might be causing excessive data usage.
Your laptop might be using Windows' peer-to-peer feature to share updates, even in sleep mode. You can check this by going to Settings > Windows Update > Advanced options > Delivery Optimization and turning off 'Allow downloads from other PCs'. This should prevent your laptop from using bandwidth for updates without your knowledge.
After outages, devices sometimes try to catch up on updates and sync data, which can lead to huge spikes in usage. Once you restart your laptop, keep an eye on your data again; you might discover something else running in the background.

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