Thank you for this post. I think that you are correct in your analysis because I started to get a lot of temporary files named iTx.tmp from early March. At the beginning of April I started to collect Temp Filex.tmp files as well. Yes I do use AVG.
All the files you mention - iTunes Library.itl, iTunes Library Extras.itdb, iTunes Library Genius.itdb, sentinel and Album Artwork, are currently on my desktop. Also on my desktop are two .xml files, not one, they are iTunes Library.xml and iTunes Music Library.xml.
Is that how it ought to be?
On my computer, one iTunes Media folder is on the desktop. There is another iTunes Media folder in the iTunes folder. There are duplicate copies of the other files in iTunes folder at present. But these files don't have the full information of my library; I cannot stop them reappearing.
My problem is that if I try to open iTunes unless I keep backup copies, everything that is active is getting written over. How can I stop this from happening? Is it to do with the iTunes Media folder? Which one should I have? Should it be empty to start?
OK what I would like to ask is 1) which files are getting in the way in iTunes and can be deleted? 2) Which iTunes Media folder should I keep? 3) Should I move everything together including the iTunes Media folder from the desktop or should I do the moving separately? 4) What should I move from within iTunes and what should I move before I start iTunes up even when I use the SHIFT and point start method? Assume that what I would like is to move all the active files on the desktop from the desktop to the default position in iTunes. Then I think that I shall be able to follow what you would like me to do. Could you describe that in detail, please?
5) Having got everything safely back into iTunes in the default setting and working. How do I stop my antiviral software from changing everything again immediately?
6) What should I do with all the temporary files when everything is working again? Can I safely delete them all?
Sorry about the long pauses in between postings, but lots of things are happening this end. Also sorry for not being terribly quick on the uptake and having to ask you lots of simple questions. I am just very keen to work out what's gone wrong and what to do. The first part, I think has now been answered, so I am just keen to fix it.
Thanks a lot.
ST