When I try to delete one add on folder from Program Files->SAP->SAP B1->Add ons, i get error like
Can not delete Interop.SAPbobsCOM: Access is denied Make sure the disk is not full or write-protected and that the file is not curently in use.
In SAP B1 this add on is removed alos
This error comes when certain sevices related to SAP is On.....
Go to Tasl Manager and end the process for the service that is going on for SAP.
STop SAP too and then try to delete that folder.
Else if you simply restart server this would get deleted easily......