I compared my other computers, and found out that the PC with the problem has a low video card memory, this causes a delay and and bad refresh capacity.
Dell 4550 Diemsion
Windows XP Pro, SP2
Maxtor & Western Digital hard drives
From windows explorer, when I search for images, the system stalls. This usually happens when there are lots of images on a drive. I feel I have enough capacity to do this.