All of them, with the possible exception of Windows CE.
Windows 95 OSR 2.1 was the first OS that supported USB, Windows 98, Windows 2000, and Windows XP all support USB, however Windows NT does not.
Windows 95 OSR 2.1 was the first Microsoft OS to support USB, although Windows 98 offers much improved USB support. Besides Windows 95 with the USB update, and Windows 98, Windows 2000 and Windows XP support Original USB, but Windows NT does not. Windows XP with service packs applied, supports Hi-Speed USB.
Windows 95 OSR 2.1 was the first Microsoft OS to support USB, although Windows 98 offers much improved USB support. Besides Windows 95 with the USB update and Windows 98, Windows 2000 and Windows XP support Original USB, but Windows NT does not. Windows XP, with the service packs applied support Hi-Speed USB support. Resource: CompTIA A+ Guide to Managing and Maintaining Your PC. Pg. 404
Windows 95 OSR 2.1 Windows 98 Windows 2000 Windows XP Windows XP, with service packs applied, supports Hi-speed USB. submitted by F.Wright Jr.
The First Operating System that used Usb Was That of Windows Xp Then Can a Special Windows Xp Hating Person That REquested Microsoft make a few minro Copies of Win 95 and Win 98 With Full for Usb and or Downloadable Patches for USB Support on the Next GEn of the time for USB v1.0 Support.
Windows NT refers to a specific product line. Windows NT 3.1 to 4.0 do not provide USB support (there are some basic drivers for USB for 4.0, but they are not included). Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, and Windows 7 all include USB support.
All major operating systems support USB devices.
Windows xp will support 127 usb ports
The "Windows 9x" line, consisting of Windows 95, Windows 98, and Windows ME. Windows 95 partially supported 32-bit / WDM drivers via the USB supplement.
Microsoft Windows 95 OSR2 (OEM Supplement Release v. 2), codenamed "Detroit", with the USB Supplement installed. Regular Windows 95 did not support USB and there was no supplement to install to support it. You had to have OSR2 or newer and the USB supplement in order to use USB on a PC. Microsoft released the USB supplement for OSR2 on August 27, 1997. A little over one year after OSR2 was released. The USB supplement was fully implemented in OSR2.1
Windows 98 does not include drivers for USB Mass Storage devices. A generic driver is available, however.
Windows 98, Windows 2000, and Windows XP all support USB