For the last few days when she logs on to Windows (XP Home edition) she gets multiple messages along the lines of "Explorer failed to start because themed32.dll cannot be found".
After pressing OK on these, just the desktop backround is left, no icons, and CTRL ALT DEL gives the same error message, so no route to task manager.
I have tried Safe Mode, and the same happens, only without the background.
I can get into safe Mode with Command Prompt, but anything else I try from there (eg start .) comes up against the same error.
Does anyone have any suggestions that does not involve losing everything on the machine?