A file COPY is a file copy, however long it takes Windows Explorer to copy the file from one place to another
EDITING a file takes a lot of computer power when it is an AVCHD
This is aimed at Premiere Pro, but may help
A link with many ideas about computer setup http://forums.adobe.com/thread/436215?tstart=0
Convert AVCHD to HDV http://forums.adobe.com/thread/390605?tstart=0
One of the inherent problems with most laptops is that they first have a "mobile" CPU, which is underpowered. Next, they usually have only one HDD, so that everything, the OS, the program, the media files and the Page File are all competing for HDD access at the very same time. Add in some unnecessary programs and Processes, that launch at boot-up, and the computer is stressed beyond usage.
The tips in this ARTICLE will give you tips on setting up your laptop for editing, but as John T. points out, AVCHD is tough, even for a Quad-core processor.
This ARTICLE will give you tips on the types of information, that will be very useful to people, trying to remotely troubleshoot.