Program and Features - Date Modified and Type details missed

madican

Distinguished
Jun 5, 2016
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I have installed windows 8.1 64bit(Clean version) years ago and today i just checked whats version of the Adobe Flash Players for installing newer version then im noticed that Date Modified and Type shows a blank...Never had this issue before,when i saw this weird bug i was in little panic.Got in my thoughts something bad( Then i googled that bug and found how to restore it.It turns out that on the header was unchecked these details and i restore it back.Now all fine! But there is have another question how it possible that these settings in header was unchecked? I even touched them! Virus,malicious i dont think so but maybe.So can you tell me how that this Date Modified and Type could be missing?Thanks.
Also in my system installed Avast free(latest version),Malwarebytes(latest version),and Adwcleaner.Regularly im checking my system by the viruses,unwanted programms,malicious and always getting clean