Is she running an anti-virus program?

>I have a program working on 75 machines and it is working fine on 74 of them.
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>This is a decision making program that looks at thousands of options and recumulates as it makes each decision and does a great deal of writing to the hard drive as it progresses through its decisions.
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>I have a client on an IBM Thinkpad with Windows XP. In her case the program does one decision and seems to stop and it makes another decison and stops again when each decision should be less than 1 second.
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>I have run CHKDSK and reindexed the files and this does not help. I notice that the underside of the Laptop is quite warm, almost hot.
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>She had her technician in and he said the computer is fine but some programs that used to work on Windows 98 don't work on Windows XP. I have this program working on other XP Laptops but I must confess that I have had some small problems from them as well.
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>I am running this with VFP 6.0
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>She is running this with MS Outlook and other programs turned off.
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>Should I be upgrading to VFP 8.0 to work in XP? Is there anything I should do to configure VFP to work better in a XP Environment? I have not asked her to run Defrag, its a very new computer.
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>Mike Smith