A friend just phoned to say that she attempted to carry out her monthly defrag on her Win Me computer and after 10 seconds it crashed. She attempted the operation a further 3 times but with the same result. I suggested that she tries turning her screensaver off but she has not had the problem with leaving it on before.
I've asked her to check that her AV software is up to date (she says that it is) and run a virus scan as I read that there was a recent virus causing crashes. However, her machine is only crashing when she attempts a defrag.