I ran CCleaner and it found
ActiveX/COM Issue InProcServer32\D:\Download\D7\tabctl32.ocx HKCR\CLSID\{7DA06D40-54A0-11CF-A521-0080C77A7786}
ActiveX/COM Issue InProcServer32\D:\Download\D7\tabctl32.ocx HKCR\CLSID\{BDC217C5-ED16-11CD-956C-0000C04E4C0A}
But jv16 PowerTools 2011 did not find it. It should have. I deleted the D7 folder.