Reoccurring memory issue-could not “read

A Windows 2000 pro user in the office is continuely getting an error that reads as follows:

The instruction at “0x01376c4a” referenced memory at “0x00e99000”. The memory could not be “read”.

I am unsure of what this means and have been told that it may be a “lack of power” issue. The error occurs usually when the user has a few programs open and/or is doing a “powerful” task.