In your BF3 directory, there should be a “vubin” folder. Does this folder contain a file called “vu-core.dll”?
Edit: This is wrong, vu-core.dll is in %LocalAppData%\VeniceUnleashed\clientvubin
If it doesn’t, please try completely removing VU and install the latest version. This might be a permission issue.
Otherwise, your antivirus might be interfering?