Hi folks, hope you're doing well

I need your help. I have this really annoying thing happening on my computer that I can't seem to stop.

Whenever I start Windows XP, this program/spyware/virus keeps taking away the focus of the active window. Nothing appears on the screen... just the current window stops being the active one. If I press ALT+TAB I see an item that reads "Downloading..." with a default windows icon.

If I switch back to the previous window (using ALT+TAB or simply clicking it with the mouse), the "Downloading..." tab disappears.

A few minutes later, the current window will lose focus again (it's happening right now, making writing this thread a pain ). This usually only goes on for 10-15 minutes and then it mysteriously stops happening (maybe the download -if any- has finished).

So far, I've ran AVG Anti-Spyware, Spybot Search and Destroy and AVG Anti-Virus, none of which found anything suspicious (except some advertisers cookies).

I tried downloading a Task Monitor program to see if I could see what it was, but got nowhere with it

I've searched the HD to see if porn images or movies or something alone those lines is being downloaded, but came up empty handed.

I'm stumped :-| Has anyone got any clues as to what I can try next?

I've included a hijackthis log with this thread, which I hope will help.