[A Moderator has moved your thread from the Virus & Malware forum to the Windows Update forum for us.]
Please answer each of the following [admittedly tedious] diagnostic questions in a correspondingly-numbered list in your very next reply, preferably
without quoting my post:
1a. When (approx. date) did you purchase the computer?
1b. Did Win7 32-bit come preinstalled on the computer when you bought it, did you do a clean install of Win7,
or did you upgrade the computer to Win7?
2. What is the full name of your installed McAfee application and
when (approx. date) does your current subscription expire? What anti-spyware applications (other than Defender) are installed? What third-party firewall (if any)?
3. Has any other McAfee application or a Norton application EVER been installed on the computer
since you bought it?
4. Did a McAfee free-trial or a Norton free-trial [PICK ONE] come preinstalled on the computer
when you bought it? (Doesn't matter if you never used or Activated it.)
5. Is KB2957689, KB2929437, KB2957503, KB2957509, KB2939576, and/or KB2957189 listed in
Installed Updates (not Update History)? [1]
6. Assuming Java is installed => Is Java Version 7 Update 65 (or higher) installed? TEST HERE USING INTERNET EXPLORER
ONLY! =>
http://java.com/en/download/uninstallapplet.jsp [2]
7. Is Adobe Flash Player v14.0.0.145 (or higher) installed? TEST HERE USING INTERNET EXPLORER
ONLY! =>
http://www.adobe.com/software/flash/about/
8a. When (exact date) was Windows Internet Explorer 11 installed according to
Installed Updates?
8b. What Update Version & KB number are displayed in the second line of text in IE11's Help | About [Alt+H+A] tab; e.g.,Update Version: 11.0.54 (KB1231231) ?
8c. Is Firefox, Chrome or any other alternate browser installed?
9. Are you in the habit of using "Registry cleaners" (e.g., Registry Mechanic; System Mechanic; RegCure; RegClean Pro; Advanced SystemCare; Registry Booster; McAfee QuickClean; Glary Utilities; AVG PC TuneUp; Norton Registry Cleaner; PCTools Optimiser; SpeedUpMyPC;
PC Doctor; TuneUp Utilities; WinMaximizer; WinSweeper; Comodo System Cleaner; Advanced System Optimizer; CCleaner's
Registry Cleaner module)?
==============================================
[1] Start | Control Panel | Programs and Features | View installed updates (in left-hand menu)
[2] No need to install Java if it's not already installed!