It is working fine now. Thank you for your support and suggestions.
I have updated its priority on taskmgr.exe to high.
There is no need to do that. It will - if anything - only make other things slower.
Yes Shorena, I changed it back a few minutes after I did it. My fan got too warm. Also, it slowed down the display of my computer and since then, Norton Internet Security has flagged up an error saying it is using high sis usage. However, I assume this is normal!
High CPU usage durring sync is normal. If your system overheats because of that you might want to look into that though. If its an older system it might be just dust clogging the air circulation.
It is fine. I would expect this from a computer that is around 6 years old.
It has been underclocked for its entire use, so that keeps its CPU very well.
When new, it was at 2.3GHz dual core - 4.6GHz! As soon as I changed the priority it stopped overheatng.
I would also expect for it to go at least 50 megabytes per hour. I think that tht is a reasonable assumption for it.