regsrvr32 not recognised

Problem arose after a windows 10 update. Opening the church database brings up message "OLE error code 0x80040154 Class not registered. Class containing OLE object is being ignored" for active X files msinet.ocx and richtx32.ocx. When I try to register these files using Command (run as administrator) I get a message "regsrvr32 is not recognised as an internal or external command, operable program or batch file" regsrvr32 is present in system 32, file 10.0.14393.0 Our system is windows 10 64 bit. Any help much appreciated.
Robert Donald

Are you actually typing "regsrvr32?"

Isn't it "regsvr32?"

yes you are right. I was following the instructions on a website and must have written the sequence down wrongly. I will go down to the machine and try again!

Many thanks

Things now fixed. There were some other things to sort out but I managed them myself. I appreciate your help

rbertoald