Thanks guys, but...
ENSONIQ5, i've run a whole computer virus-scan and a 'Program Files -> Windows' scan, AVG free, and not made a difference. No threats found. Is that what you mean by a 'deep virus scan'?.
I first started on win98 and now a staunch xp supporter till the bitter end. When the internet has completely abandoned xp i'll need to upgrade, but my home pc, which stays off the internet, will keep xp, i hope, forever. I will need another home pc 1 day soon, but will get a good second hand 1 running xp.
siragin: With windows xp it's 'right click -> open with' and it suggests notepad or firefox. (firefox!? lol). Theres a list of other programs below them, but not anim8or, so i click on the browse button. I locate anim8or.exe, select it and click the open button. It goes back to the previous dialogue but there is still no sign of anim8or showing.
The 'remember my settings check box' is actually a 'Always use the selected program to open this kind of file' checkbox. Notepad is selected, so i don't check that box. For interest sake i hav checked that box, but then it just opens the file with notepad.
Thank you both for your suggestions, but anim8or still not being recognised.