Go to add remove programmes in your control panel and uninstall anyting to do with(if there).
iMesh\iMesh5
Close control panel.
Click start/run and type regsvr32 /u C:\Program Files\iMesh\iMesh5\iMeshBHO.dll into the run box and press the enter key. Note the space between the 2 and the forward slash and again between the u and c.
Run HJT with no other programmes open. Have HJT fix the following, by placing a tick in the little box next to(if there).