This link suggested by JudieRaman:
http://word.mvps.org/faqs/DrwGrphcs/...leGraphics.htm
is IMHO a very generalised & overly complex coverage of all possible problems.
The simple fact is we all need a simple straightforward reliable way to copy-paste both text & images from websites to Word.
It's a basic everyday need for almost everyone.
It appears to me, after hours spent experimenting that first you need to check that your Normal.doc has specific settings embedded.
These are covered in the article to which the link points, even if it is written as though it may or may not work.
Do not be put off by the overly technical "explanation of the problem" - that's MS's concern, their job is to ensure their programs work (always!).
And don't accept the offered "best solution" of seperately saving pics to another file & then copy pasting to Word.
That's no solution to anyone who's busy & it's not what you need to do.
From Word 2000 on, in all OS's, it should be easy to copy-paste from web to Word - both text & graphics without any special problems.
It seems however if things go wrong, as usual you need to wade through several settings (with no adequate explanation of the effect as per usual - thanks MS) until the magic combination is found which is the default for Word anyway.
The required settings are covered in the article - good luck.