Windows 10

[whistonian]

My GB allowance appears to be getting eaten up.How can I check if something is running in the background,TIA.

[Buenchico]

The usual reason that Windows 10 eats into data allowances is because it frequently downloads updates for itself. It's not designed to be used on internet connections that aren't 'unlimited'; it forces users to accept updates, whether they want them or not, using up lots and lots of data.

You need to set your connection to 'metered':
https://www.howtogeek.com/226722/how-when-and-why-to-set-a-connection-as-metered-on-windows-10/

[ichkeria]

Yes indeed: we recently took a mobile broadband contract and I asked the chap in PC World that very question. He was unable to provide the simple solution buenchico has just outlined, and I had to google it for myself. The fact is most non-unlimited GB allowances are seriously at risk of lots of things, and there is very little sensible advice around about how to manage this.

[whistonian]

Thank you Buenchico.

[Guilbert53]

Remember of you have Sky (or similar) that may also download data if it is connected to your broadband.

So does any smartphone or tablet, they all use data.