Everything in the office is shocked: what to do and where to look for the problem

Olga asks:

Hello! In the office, it shocks from everything: a chair, a wall, a microwave oven, flowers... During the day, constantly, got up from the chair - went to the wall, touched - sparks, touched the microwave - sparks, returned to the chair, touched - sparks ...
How many times you get up from the workplace - so many times and then knocks... And it hits so noticeably. Shocks one after another at once (for example, a microwave oven, a flower, a chair)... The director of the landlord explains that this is static (he hits everyone, it's okay). The electrician came, checked with his special screwdriver (sorry, I don’t know the correct name), it was on. They turned off the electricity at night in the office (they cut it out in the dashboard), in the morning it also shocks... They have been thinking for a month what this can be be, they can’t come up with anything (they tell us “well, you’re more careful there”... but how ?!) We are somehow afraid to be in cabinet. Tell me, what could it be?

Office in an 8-storey building on the 3rd floor, 34 sq.m., two large windows, two cast-iron radiators. From technology - 3 computers, a microwave oven, a cooler. There are always 3 people in the office.

Hello! Does he hit everyone, or just some? If the latter is the case, change clothes for another one made of different materials. Does it beat like - 1 time, but when you touch it again, it does not beat, or does it beat again?

We cannot answer for sure, because we do not know how the electrician determined that there is voltage everywhere... Maybe his screwdriver glows from everything.

In general, I believe that it is still static. Even with wiring faults, why should flowers and chairs be shocked? Why was the electricity turned off at night if you are in your office during the day? With the machines turned off in the dashboard, does everything continue to beat? If it continues, the problem is definitely not in the wiring. Are there any possible sources of a strong electric field such as overhead power lines, any laboratories and workshops connected with electricity in adjacent rooms and floors?

Is there grounding? To remove static, in fact, everything must be grounded, potential equalization must be performed.