I need some help for a frustrated friend and a bit of embarrrassed me!

My friend is in the US with her new EeePC900 but is so brassed off with it. She is so sick of it telling her she is short of space on the hard drive. NOTHING new has been loaded on it except for the little anti virus I put on it (NOD32?). She tries to send emails and they won't go if she does multiple ones as it says there isn't enough space.

She has talked to my on SKYPE with no problem.

Earlier on in her trip I got her to clean up the drive and it worked ok for the rest of the evening. Told her to clean it every night but she is  still having problems. I know it has another partition(?) - D and it has plenty of space on it.

What can I suggest to her that she does. I encouraged her to buy it and now i feel so guilty!

Please help.

Donna