Windows 10: My computer is suddenly blocking downloads - seemingly all of them.

Yesterday I downloaded my Turbotax software to my laptop, connected to a large monitor. The downloads moved all the way to 100% and then immediately sent a "BLOCKED" notification. When I spoke with an expert from Turbotax she helped me disable my firewall and also all antivirus software. But it didn't help. It was impossible for her to use their program to share my computer screen. It was also blocked from downloading. I was able to download the Turbotax software to my Microsoft Surface. But I do not have a full keyboard for that device and the screen is tiny. I only have the qwerty keyboards

:)

 

UAC prompt for Task Manager. MMC blocked. What happened?

It's possible that Computer Management is being blocked by SmartScreen. We suggest disabling it and see if it helps. Follow the steps below:

1. Click the Start button.
2. Type smartscreen in the search bar.
3. Click Change SmartScreen settings.
4. Click the drop-down arrow in the Security row.
5. Click Change settings beneath the WindowsSmartScreen row.
6. Click Don't do anything (turn off Windows SmartScreen).
7. Click OK.

 

My PCBackup suddenly blocked by Administrator (that's me)

User Account Control is a very important component of Microsoft's overall security image. It helps prevent unauthorized changes on your computer which may affect its security. To resolve your issue, we suggest that you turn off the User Account Control and
see if it would let you access the program again. To turn off User Account Control in Windows 10, follow the provided steps below:

• Open your User Control Settings by clicking Start button, and then clicking
  Control Panel. In the search box, type uac, and then click Change User Account Control settings.
• To turn off UAC, move the slider to the Never notify position, and then click
  OK. If you’re prompted for an administrator password or confirmation, type the password and provide confirmation. You will need to restart your computer for UAC to be turned off.

Note: Turning off these feature would possibly allow you to open the blocked program but can affect the security of your device.

Hope this the steps above works for you.