There is an issue with Windows 10 and Windows 8.1 in regards to low volume levels when recording or taking an input. The below drivers are of no help to fix this. However there is a third party piece of software that is free to download called Equalizer APO that will make changes to the input for devices connected. In the background of this software in allow the input boost to happen that was removed from Windows 10. You can download software here: Equalizer APO
USB Audio Drivers for older operating systems are below.
AT2020 USB
File: wdma_usb.inf_amd64_4dce333d5871d4ae.zip
8e9866f2403986d3af4ef0657bd7a0d22bfa1a81430d5b5fc8160fdac141b1dc
AT2020 USB
File: wdma_usb.inf_x86_72ca08776d331b0f.zip
926711960e2345c5d37cb3c243681cb14e6918c74306afbccf75c47d1195d01c
AT2020 USB
File: wdma_usb.inf_x86_36b3f50da023e839.zip
4ffb456c4cc8666aac79be036ffad4d9b8aa31e5dc9e69e1722d94c03297ef1f
AT2020 USB
File: wdma_usb.inf_amd64_e5a2ff40b55d32b9.zip
dcd01dd4fdf060c11707746cfed7651989b8ac1e6c0c6d5c302d4ae132f0f29a
AT2020 USB
File: wdma_usb.inf_x86_neutral_3436210257797730.zip
0007ffcd4b049aff517aa9928b5329a495b91054d8e811275db66970ec877586
AT2020 USB
File: wdma_usb.inf_amd64_neutral_c81656b241a238c8.zip
717a77ada6dc850ea645ae69df3f9a22ffd67765f4eb7102819db2ce7b75f310
ELEMENT: Fixed-charge back plate, permanently polarized condenser
POLAR PATTERN: Cardioid
FREQUENCY RESPONSE: 20-16,000 Hz
POWER REQUIREMENTS: USB Power (5V DC)
WEIGHT: 13.2 oz (374 g)
DIMENSIONS: 6.38" (162.0 mm) long,
2.05" (52.0 mm) maximum body diameter
OUTPUT CONNECTOR: USB-type