[SOLVED] Logging in bugs, is it a virus?

Jun 29, 2019
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Recently I got a bug that is pretty weird...
Sometimes when entering PIN after tuning on my PC i get something like "too many tries, enter A1B2C3" BEFORE i touch my keyboard. Also after entering correct pin there is a incredibly short flash of green color on a part of the screen.
What do I do? Is it a virus?
Do i need to restart my drive or something to solve this problem?
Is it harmful?
Please for help, thanks for all answers.