Originally Posted by temek
This might not necessarily be anything malicious at all and could actually be something simple like Windows Update just downloading updates (assuming you have set it to automatic). The pattern of the downloading would match that as well and 70MB isn't necessarily that much if multiple updates were downloaded at the same time. I would check Windows Update and see whether any updates were downloaded/installed around the time you experienced the higher data usage.
Possible. Strange that since I noticed it going up (it was quite sudden), it had always gone up significantly every time I logged on. Furthermore, I had been using mobile broadband for nearly three months and this never happened previously.
And also - think I mentioned it somewhere above - whenever I shut down my computer since then it had multiple updates each time. That doesn't usually happen. However, when I shut down after doing my scans it didn't have any updates.
Anyway, I'm shutting down so will try to look into all this again tomorrow and come back to give an update. Thanks.