Windows Freezes When Copying Large Files After A Search?

I have 2 internal-sata hard drives(320 gig. And 2tb.) and 1 external usb/2.0 hard drive (750 gig.). The pc is an old dell gx520 tower with a fresh install of Windows 7 pro. No antivirus, network connection, or firewall enabled. Processor is a Pentium4 running 3 GHz with 1.5 gigs of ram. This is the problem: If I do a search on the 2tb. Drive for all of the jpegs, I have a total of about 84000 pictures. When I select all of the pictures and right click-copy and try to paste to another hard drive the pc will lock up and won't display a copy status window. Windows says it's not responding. Now, if I right click-copy a single folder which has anywhere, from a few files to several hundred gigs. of data in it, using the same 2tb. Drive, it will copy over to another drive just fine. I have tried, changing the swap file from "windows managed" to, up to 20 gig. Thinking the search was maybe having to write to the swap file. This didn't work. I also booted in to safe mode and tried to do the copy from the 2tb. To the 320gig. drive and still no difference. I have tried this with windows copy handler and teracopy. It all has something to do with the fact that I am doing a search for the files before copying them.