Here's a link to a discussion about how you can go about resolving clipboard problems: http://social.technet.microsoft.com/...3-E5C6677DE280
Note that mention is made of a program named 'Babylon Translation Software' causing problems. If that's installed on your system, it could be the culprit. Other software that is installed on your system could also cause problems. If the problems only started occurring after installing a particular application (or an update to one), try uninstalling that application (or its update).

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]