I have an HP Photosmart 7260 printer, just acquired, and have used the card reader in it to transfer photos from an SD card to my PC running Windows 98 SE. They transfer o.k. but on switching off the printer before removing the card the PC freezes, necessitating several Contr. Alt. Dels, or a switch off and reboot.Scandisc then runs. Any suggestions what I'm doing wrong please.