or maybe it was a Trojan; anyhow, it was nasty. Sinowal (aka Torpig) had gotten iteself onto my daughter's netbook and I've ended up doing a factory restore to get rid of it. It's a scary little bogey, especially since it wasn't detected by the usual antivirus programme. It allows hackers free rein over your computer and is really difficult to detect and remove. http://windowssecrets.com/top-story/dont-be-a-victim-of-sinowal-the-super-trojan/ Fortunately, Windows Security Essentials found it for me. http://windows.microsoft.com/en-GB/windows/products/security-essentials I'm going to replace the antivirus software on my other computers with this little gem.