Early POST / Power-on reset Meaning: Code 01 is often the first step after the board receives power and the reset signal is de-asserted. The BIOS is beginning to initialize the CPU’s internal registers, cache, and microcode. On Intel Desktop Boards, code 01 passes almost instantly under normal conditions.
Open the Command Prompt ( cmd ), type ipconfig /all , and search for the 12-digit string listed under "Physical Address". intel desktop board 01 21 b6 e1 e2 er