Just to keep the amount of typing down I'm to post a repost that applies to your data use issue. Be aware that while you have not made any changes many websites have lately, more auto-start videos and many now are going with "pre-fetching" of videos "just in case you wish to see them". For that you have to load a browser extenuation.
At this point I'd say watch what and when you allow devices on your wireless network and install the free version of Glaswire on the computer so as to see what is running in both programs and processes.
There are many background processes that use large amounts of data. There has been a change in the way the Microsoft presents updates across the board as "roll[-ups".
Many more websites now have auto start videos and now more are doing a "pre-fetch" on their clips. About all you can do is install ad-block, flash-block and now Flash Control to ease the per-fetch issue.
Then we get into routers and wireless security.
There have been three notable security issues reported by Cisco, Netgear and D-link that need to be patched by router firmware updates. It really is a jungle out there.
Additionally a security audit should be done to insure that certain things are done:
> Default username and password for the routers GUI is changed<
>All guest accounts are disabled<
> Remote Access is disabled<
>Wireless encryption at least to the WPA2-Personal standard in enabled on all available freque ncies<
> WPS is disabled<
> All internal cloud and sync functions are disabled<
>All internal "Services" be disable or reviewed for data cost/benefit<
For Windows computers I suggest that you install the free version of Glasswire so that you can more easily track usage of both programs and processes.
It is important to remember that Glasswire will only track and report the usage on the single computer upon which it is installed. Multiple computers will require that Glasswire be installed on each machine and the data correlated.
Due to privacy issues your ISP is not going to track your data usage in anything more than a general way with out a court order.
If you choose to "Network" your connection the responsibility of administering and securing that Network falls on you, not your ISP.
Glasswire will truly help on the Windows computer within your Network but the wireless channels are a more difficult matter.
Do NOT overlook wireless printers. Depending on settings and permissions they can use massive amounts of data if allowed to update their software s uite. Some of the HP printer driver/software bundles can run into the 100's of MB's
There recently was a Hughesnet user who found that a misconfiguration of her printer was allowing her husbands laptop to access the Network using the printer as a wireless access point. This was during periods where is 'net access was curtailed due to excessive usage. His computer searched out available connections and connected automatically.
In other hardware related issues. Nvidia, one of the major graphic chip/card manufactures as constructed their latest video card driver to collect and share "telemetry" with the company. This is said to be using large amounts of data.
Windows 10, in addition to "forced updates" in most cases also collects telemetry data and shares it with Microsoft. This behavior can also be found in Win7 and 8.1 depending on what Win Updates you have installed over the last several months.
I suggest that you check the capabilities of your present router to see if it allows the tracking of usage by device.
Every byte of data that you use HAS to go through your router so that is the most central point for you to monitor your usage as a counterpoint to usage claimed by your ISP.
If your router does not have this capacity I strongly urge you to get one that does.
As an example here are some screenshots of my Asus RT-AC3100 and its "Traffic Analyzer" function:
Usage by date and device:
The 3100 may be a little pricey for some budgets but there are less expensive models that also have the Traffic Analyzer function so read the specs carefully to be sure you are getting a model with this important feature.
At times you can find factory refurbs with full warranty's available at considerable savings at places like newegg.com among others.
the same day 6 files appeared on my computer about wirerless router. The Excede Tech told me to check for a virus ----Never thought a Mac could get infected -well it didl
By the way, I run the virus check frequently and upgraded my ASUS router to a higher level. It also has Traffic Manager. Neither the old nor the new one showed any other devices then the ones we use. One computer on the list showed a browser I had never heard of before. With the cell phones, we use an older model of phone that doesn't connect to the internet. We live in a rural area. There are more cell phones on the list then we have neighbours!
Thank you to everyone who offer assistance to those of us seeking help. Please remember not all of us have a computer/digital background. The terms 'User Agent Switcher' or 'user agent string' may be elementary to you, but not to others. Often, those of us looking for help are the ones with the least computer/digital background. I will try to improve my computer/wifi lingo but in the meantime, please try to translate into English.