It's not a problem, and there is no solution required.
DOT4 ports are "virtual" ports used for functions in a multi-function device such as an all-in-one printer. You would expect at least one new DOT4 port for every function (e.g. fax, memory card reader, printer, scanner, etc) in a USB device you install.
16 ports does seem a bit high, but it does not necessarily indicate a problem. For example, if you had four multi-function printers currently or previously installed, that's about the number of ports you should see.
If you're still worried about this, post a list of the ports.
The ports mention in system are : USB001,USB002,USB003,USB004,USB005,USB006,USB007 and DOT4_001,DOT4_002,DOT4_003,DOT4_004,DOT4_005, DOT4_006,DOT4_007,DOT4_008,DOT4_009,DOT4_010, DOT4_012,DOT4_013,DOT4_014,DOT4_015,DOT4_016 Every time I connect any printer a new copy of printer install on a new port.Some USB printers install on DOT4 port rather then USB.If a printer install on DOT4 port printer print the document after 1-5 minutes if same printer install on USB it prints immediately Why? How to restrict the printer to install on USB only?
Some USB printers install on DOT4 port rather then USB.If a printer install on DOT4 port printer print the document after 1-5 minutes delay if same printer install on USB it prints immediately Why? What is the solution?
Yes I done this. When I install a printer after removing all printers.The new printer instead installing on USB it install it at Dot4 port when USB ports are free. As I mentioned you that When select show hidden devices there are no DOT4 ports display. Only USB Universal Host Computer, USB2 Enhanced Host Computer, USB Root Hub, USB2.0 Root Hub. are displayed.
I have many printers here is the list: HP1000,HP1010,HP1020,HP1015,HP1005,HP1160,HP1320, HP2300,HP2420,HP3005,HP3015,HP3050,HP3600,HP3800, HP4250,HP4350,HP5200,HP5500, SAMSUNG ML-2550,ML-2551,SCX-4720FN, EPSON EPL-6200
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