Dell G3 3579 Keyboard not working/lags/types multiply letters after BIOS update

Made updates via SupportAssist today, restarted pc after updates completed and now keyboard does not work propely. Could not even log in to the system so I had to connect USB keyboard.

For example, if I press "abcd" either nothing will be typed or only one letter multiplied, like "ddddddd" even if I pressed only once.

Restarted pc again and nothing changed.

These are the updates which were made:

- Dell SupportAssist OS Recovery Plugin for Dell Update - A00 

- Realtek Memory Card Reader Driver - A03 

- Dell G3 3579 and 3779 System BIOS - 1.25.0 

- Dell Security Advisory Update - DSA-2021-088 - A02 

- Realtek PCIe Ethernet Controller Driver - A18 

Could it be BIOS update? 

Please help, this is my only one pc and I need its keyboard to work. 

Thamk you in advance!