Assuming Windows 10 64-bit...
Please answer each of the following [admittedly tedious] diagnostic questions in a correspondingly-numbered list in your very next reply, preferably
without quoting this post:
1. When (approx. date) did you purchase the Samsung computer?
2a. When (exact date, preferably) did you upgrade to Win10?
2b. Was the upgrade to Windows 10 (not Windows 10 Anniversary Update or Creators Update) offered & installed via Windows Update or did you choose to upgrade manually?
3. What is the full name of your currently installed McAfee application (e.g., McAfee LiveSafe) and when (exact date, preferably) does your current subscription expirer or auto-renew?
4. In File Explorer [WinKey+E], navigate to & right-click on:
- C:\Program Files (x86)\McAfee <=this folder
Select PROPERTIES: What's the CREATED date displayed on the resulting GENERAL tab?
5a. When (approx. date) was the last time you ran the McAfee Consumer Products Removal Tool?
5b. ...the Norton Removal Tool?
- Fact: McAfee and Norton applications are notorious for not upgradeing (or uninstalling) cleanly. The "leftovers" may be your troublemaker here.
6. When (exact date) was KB4015219 installed according to Installed Updates
(not Update History)? [1]
7. Is Adobe Flash Player version 25.0.0.148 (or higher) installed? TEST HERE USING INTERNET EXPLORER OR EDGE
ONLY! =>
http://www.adobe.com/software/flash/about/
8. Is Firefox version 53 (or higher) and/or Google Chrome version
58 (or higher) or any other alternate browser installed?
9. Are you in the habit of using "Registry cleaners" (e.g., CCleaner's Registry Cleaner
component; Registry Mechanic; System Mechanic; RegCure; RegClean Pro; Advanced SystemCare; Total System Care; Advanced System Optimizer; Comodo System Cleaner; Glary Utilities; Registry Booster;
McAfee QuickClean; AVG Quick Clean; AVG PC TuneUp; Norton Registry Cleaner;
Norton PC Tuneup; PCTools Optimiser; SpeedUpMyPC; FixMyPC; PC Doctor; TuneUp Utilities; WinMaximizer; WinSweeper; Wise Care 365; Wise Cleaner; etc.)?
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[1] Settings | Programs | Programs and Features | Installed Updates