Hi no123les,
What did you use to check the memory?
Memtest86 - Memory Diagnostic Page is probably the best. (also the one that microsoft 'provide' a link to)
Get her to follow these instructions to increase the page file size...
Right click on My Computer -> Properties -> Advanced -> 'Performance Options' Settings -> Advanced -> Change
Set to custom size...the Initial Size (MB): should be set to her total amount of
ram, and the Maximum Size (MB): should be set to double.