Explorer has started failing to open Office documents when there is a space in the directory name.

Example: I double click a Word document that has a space in the directory name. Word opens and tells me "Word cannot open the document". OK that message. Then the next message says "The path name is not valid" and mentions the directory name up to the first space. OK to that. Then the next message says "The path name is not valid" and mentions the directory name from the first space to the next space. And do on till there are no more space separated parts of the directory name.

Opening docuements from within an Office product works fine.

The only thing that I can think (however unlikely) that caused this to start happening was the installation of a HP CD burner on the LPT port.

Any help much appreciated.

Greg