File Sort Order after installing SP1

Windows 7 64 bit SP1 - Clean Install

I have found an incredibly annoying problem. I have external USB drives on my laptop, both esata and USB 3. I store a lot of HD video clips that I take on them. It is very important that I set the sort order to Date Created (due to the naming convention on my camcorder)

Before doing a clean install from Windows 7 64bit to Windows 7 SP1 64bit, if I changed the order in explorer it quickly changed and then remembered the sort order, so next time I went into the folder on my external drive the files were in the correct order.

Now, whenever I go into the folder it takes up to 5 minutes to sort the files (there are some 4000 files in the folder). If I go to other folder on my laptop, then back to that folder, it takes another 5 minutes to sort them again!!

Has anyone experienced anything like this? At the moment I am tempted to go back to pre-SP1.

I have taken the external drive to another laptop i have with SP1 on it, and it does the same thing. It's driving (no pun intended) me crazy. I can't wait around for windows to re-order my files whenever i go into that folder, espeically as it takes such a long time.

Thanks for any help or suggestions

Isn't it wrong in the English language to sort after "The"?

I mean, it's Arrival, The not The Arrival... as with many movies on my computer i have to put The at the end otherwise all those movies with that presentational form will be sorted under the letter T and not A as it should be.