The operation of computers is complex and involves the allocation and reallocation of resources which include; the processor, memory and hard disk space. All the programs that the user makes use of are loaded into memory for him or her to work with. Also the user's data is loaded into the memory for manipulation. Computer errors that come as a result of lack of memory cause the computer to be unresponsive. The errors are usually referred to as out of memory errors and they occur because all the available memory including the disk swap has been used up.
Sources:
Event ID 1003 System Error Error 3194 Error 678 Error 651 Error 619