Hi Cacano. I'm Greg, 10 years awarded Windows MVP and Volunteer Moderator, here to help you.
- Try these fixes for "Smartscreen can't be reached right now" error:
https://thegeekpage.com/fix-the-windows-smartsc...
https://www.makeuseof.com/windows-smartscreen-c...
https://technoresult.com/fix-smartscreen-cant-b...
https://www.youtube.com/watch?v=8XcVytFR0d8
- Go over Windows using this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done: http://answers.microsoft.com/en-us/windows/wiki...
Start with Step 4 to turn off Startup freeloaders which can conflict and cause issues, then Step 7 to check for infection the most thorough way, then step 10 to check for damaged System Files, and also Step 16 to test a new Local Admin account to replace yours which may be corrupted. Then if necessary continue with the other steps to go over your install most thoroughly.
- If nothing else works then do the minor, non-destructive Repair Install which reinstalls Windows while keeping your files, apps and most settings in place, brings it up to the latest version and solves most problems.
https://www.tomshardware.com/how-to/fix-windows...
Feel free to ask back any questions. Based on detailed results you post back I will have other suggestions if necessary.
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