I will suggest you to buy an original license key from Microsoft because its an one time investment and because you do not want to get malwares and spywares.
Three Reason USB can be blocked
1) OS level
2) Bios level
3) Network level
Os level - check the system setting in control panel if you are using windows OS
Bios level - enter the Bios when the windows starts and check the property of peripherals connected
Network level - a script is run during...
Many times malicious code has two common traits:
1 ) It’s appended near the top or near the bottom of valid code. It’s rarely inserted within valid code as it may break that code, defeating the purpose which is to run undetected.
2) It’s been encoded in Base64 - a binary-to-text encoding scheme...
It's a little tough since you haven't even given a clue whether it's a 3.5 mm input or USB, but check and see if you have an option to “"show disabled (hidden) devices” on your sound and settings. Click to show all and reconnect your mic. If it shows up click to make it the default recording...