During startup, this file is used by download assistant to check for newly released updates by Logitech. It is located in the C:\Windows\System32 folder. The LogiLDA.dll file is the software component of the Logitech Download Assistant. But don’t worry, it will be fixed easily.
Many users have recently reported a similar issue. Are you facing issue regarding LogiLDA.dll? Although this is very frustrating, you are the only one facing this problem.