Security :: Turned The Router Off And On Again A Few Minutes Later Initially The Light Was Still Blinking Abnormally?

Not doubt this sounds alarmist, and perhaps it is... anyway, earlier tonight my mum complained that her home network connection wasn't working. After complaining about Windows and running a virus scan, I returned to my laptop, only to find my Ubuntu 10.04 was having the same problem. Then I noticed the wireless connection light (next to send and receive, which always blinks anyway) was constantly flashing, as if transmitting data, even though neither of us was connected, of course. I turned the router off and on again a few minutes later. Initially the light was still blinking abnormally, but I could now access the internet, as could mum, so I ignored it.

Later on, while the virus scan on mum's computer was running, Windows notified her she was running out of hard drive space - normally about 30GB of the 51GB HD is used on her laptop, but suddenly 50GB had been used. I also noticed my 275GB Ubuntu partition had 235GB free (although total size of files on disk was 128TB - a bug perhaps?), i.e. 40GB used, which seems pretty large for a rather fresh install and a handful of documents!Currently, everything's normal where my router's concerned (no blinking lights except for my browsing), and my Lucid partition is still showing 235GB free (strangely, mum's laptop now shows 46GB used instead of 50GB). So, what do we make of all this? Were our computers hacked for storage space?