Hard drive filling up to 0 bytes free

[Cuzman]

OK, so AVG Free, Ad-Aware 2007 and Spybot Search & Destroy all come
through clean. I have Windows Defender running too. I also have
everything from Windows Update.

My internet connection isn't always great, so I am prone to logging onto
my next door neighbour's unsecured network and "borrowing" their
internet. Wrong, yes. I know that, but sometimes it feels necessary.
However, when i do this, and only when I do this, my hard drive space
fills up until there are 0 bytes free. On a drive with nearly 100GB
free that doesn't seem right. I have a 200GB on C:\ and a 320GB storage
drive on G:\. The storage drive is unaffected by this phenomenon.

Can anyone advise on what might be going on, and how I can stop this?

TIA

 

[Pegasus \(MVP\)]

OK, so AVG Free, Ad-Aware 2007 and Spybot Search & Destroy all come
through clean. I have Windows Defender running too. I also have
everything from Windows Update.

My internet connection isn't always great, so I am prone to logging onto
my next door neighbour's unsecured network and "borrowing" their internet.
Wrong, yes. I know that, but sometimes it feels necessary. However, when
i do this, and only when I do this, my hard drive space fills up until
there are 0 bytes free. On a drive with nearly 100GB free that doesn't
seem right. I have a 200GB on C:\ and a 320GB storage drive on G:\. The
storage drive is unaffected by this phenomenon.

Can anyone advise on what might be going on, and how I can stop this?

TIA

You need to find out what's eating up your disk space.
Use "My Computer" to examine your various folders.

Does your neighbour know that you're tapping into his
network? Does he have a firewall? If he does not then
your machine might get hacked, which might be his
just revenge for you stealing his Internet connection.