I have been using an email package called pocomail for many years now and have installed it on a wide variety of machines. It has worked perfectly well and briskly on all of them except one... An Acer laptop with Windows-7/64bit.
The laptop itself is perfectly speedy for all tasks I throw at it other than pocomail email downloading. The slowdown is not subtle - its probably 10X slower than on any other machine. It's as if some human was manually reading each mail as is comes in!
If I leave the laptop for a while and the mail server has a couple of hundred (small, mostly attachment free) emails to download, it can take half an hour or more to download, whereas I can download the same lot on another PC on the same internet connection in a minute or two.
Any suggestions would be welcome.