Today I runned Norton Defrag manually, it started for my C:\ drive, then I minimize this windows. When I open this window after some minutes I noticed that defrag animation stucked. Defragmentation worked, defrag timer also worked fine but all animation was stucked. I saw this thing some months ago using NS 22.8 by the way and it also started after minimizing&opening this window. I marked this stucked things by arrows at my screenshots. Who can confirm this issue?
