Hi folks,
Be intrigued, take a look at http://communities.vmware.com/message/2165823
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Try deleting the following file from Tools to disable the Unity functionality, and then restart Windows:
C:\Program Files\VMware\VMware Tools\plugins\vmusr\unity.dll
The rest of Tools features such as resolution changing and copy+paste should continue to work even without the Unity plugin.
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By deleting the file be interesting to see if you still get reports of failures in the event logs.