comctl32.ocx is a file required by many old application in order to work with serial ports . This OCX will not register as most of know, by putting in in the system32 folder and typing the command “regsvr32 comctl32.OCX”. With newer 64 bit systems it is a bit tricky. Here is how to do it
1. download the file here
2. Copy it to c:\windows\syswow64
3. type the following “Run” command “CMD” then right click the command prompt search result and hit “run as administrator”, in the command prompt type: “regsvr32 c:\windows\syswow64\comctl32.OCX” and yes, you must type the full path to the file, not just the name.
4. That’s it it should work now.