Problems Moving/Copying Folders

So I've been having this problem for a little while now, still can't figure out why it is... but yeah. I'll copy this from another forum that was completely unhelpful. :]

Just did a clean install of XP after trying out vista for a sec [figured might as well see how sp1 goes, and oh boy, lol] but yeah... Everything went smoothly on the XP format and install...everything's up and running now. I've just been experiencing this thing where I try to move or copy a folder from one place to another and it won't transfer the whole thing...just some of it. The little transfer window doesn't even come up. This has only happened when trying to copy/move from desktop to like, my documents or another folder so clearly there's an issue somewhere... I've also ran memtest and seatools for my HDD and everything passed... so only thing I can think of now if it's software is corrupt XP files... but I doubt it 'cause the problem's been there after several formats and everything. So...Idk.

I noticed that when I move some of these certain folders [all in my docs so far], the process will sometimes lag, then the dialog for the transfer pops up and it'll go through, sometimes slowly, sometimes partially and then the messages come up. I really need to get to the bottom of this... It's driving me crazy!

I also get this message as a result of the pending transfer taking so long I guess... ah.


Here's my setup:
Biostar TF7025-M2
AMD X2 4600+
4GB A-DATA DDR2-800
Seagate Barracuda 16MB 250GB
XFX 8600GT XXX 620mhz


Possible causes [that i can think of after everything else i checked out]:
Bad SATA controller or cables?
Something else. Lol.

Reinstall Vista.