Model open suddenly takes very long to open

[HechtwieFisch]

Good day to you,

since last week or so when I want to open models in Solibri 9.12.10.20 it takes from 30 sec to two minutes or longer for the window where i pick the models / Solibri file to open. As Solibri didn´t update and it also happens on a different computer of a colleague with the newest version of Solibri I would guess it is a windows issue. Any ideas what could cause this ?