Quick scan came up clean and yes, I have been downloading scads after an XP meltdown on Sunday week, but not themes. Sygates log viewer shows 'Allow' so it was definitely Avast that was giving the notifications, possibly related to me refusing to give WMP11 permission to phone home!!
Any way, I downloaded Avast again, went offline and uninstalled and reinstalled it. Scary moment during this as twice Windows refused to shut down, requiring power off shutdowns and a 'Last Known Good Configuration' reboot, and also would not connect to my router upon restarting. All seems good now so will wait and see. In the middle of all this hassle were also automatic updates downloading and installing, so I think Windows tripped over itself a couple of times but seems to have recovered nicely. (
On other posts, I have expressed my annoyance at how manufacturers refuse to supply a hard copy of the OS with the sale of a new PC, and how I had taken PackardBell's Smart Restore off my harddrive and burned it to CDs. I was very glad that I did as the reinstall went very smoothly from the CDs. The reinstall started immediately, without prompts, as soon as the first CD was inserted in the drive, so just be aware if you do this.
I know what you are going to say USASMA, LOL. I now have a drive cloner and will be working on it.