Error 0x80010135: Path too long (Windows)

When you unzip the legacy RISC-V SDK on Windows, you may get the error message:

An unuexpected error is keeping you from copying the file. If you continue 
to receive this error, you can use the error code to search for help with 
this problem.

Error 0x80010135: Path too long

This error occurs if you try to unzip the SDK files into a deep folder hierarchy instead of one that is close to the root level. Instead unzip to c:\riscv-sdk.