The problem is NOT the Presonus drivers. You yourself said as much:

I wanted to use on windows 10, like on the old PC, my FSPs (2 pcs).
I put the FW card on a TI chip which worked great the last 8 years with win 10

If UC, your TI FW card and your two FSP "worked great" on your previous Win10 system, then the problem cannot possibly be UC....provided you are attempting to install the correct version.

UC 1.7.6 works just fine with Win 10 x64. I have three Firestudio 26x26's and two Firestudio Mobiles that work with no problems on FOUR separate pc's running Win10 x64. Two laptops with PC Express cards and two desktops with PCI cards. All, of course, with TI chipsets. Either your TI drivers or Universal Control may have been improperly installed. I suggest attemptng a full
clean uninstall/reinstall of both sets of drivers.

If you are trying to install an earlier version of UC than 1.7.6. ,(or a 32 bit version), that could be your problem.

UC 1.7.6 is here:

https://legacy.presonus.com/products/FireStudio-Project/downloads

That being said we can help you better now and in the future with a bit more info......if you will post your system specs in your signature, (see my sig), we will be better able to troubleshoot your problems. Without knowing what type of pc you're running, what OS you're using, what DAW, make and model of your audio interface etc....we often can't recommend a "simple fix"

Hey,
the situation has changed. After many days of trying to get FSP up and running on new hardware, I had to go back to the old setup, wanting to finish the studio projects for the upcoming EP.

My OLD configuration:
Intel i5 2320, 6GB Ram 1600Mhz, Win10 64bit, 4TB HDD

because some time ago I got from a friend an i7 2600k which is several percent faster than the i5 2320, I replaced the processor. So I got another processor - a faster i7.

To my surprise, the card when inserted into the old PC behaves identically to the new one!!! Interfaces do not connect, red LED.
I reinstalled the FSP, using UC1.74 Unfortunately, to no avail, the interface still does not connect. I changed the connection slot in the FW card to another, but the same effect - did not connect. Reading the forum, I found hints that you need to change the clock source. Unfortunately, when I click on the clock source in the UC menu, there is a BUSTED BOX, I have nothing to choose from! And the drivers have a description as 0.0.0!

To sum up - my FSP does not work at all, neither on the old computer nor on the new one.
Several times I checked the correct installation of the pcie card, pressed the power supply, etc - everything is ok and the effect is always the same. I thought that perhaps the cable is damaged, I bent it in different directions, reset the computer and still the same - it does not connect.