Continued from here: https://community.mcafee.com/thread/44099?start=10&tstart=0
Have you been running Registry Cleaners or Optimizers? These will destroy McAfee and other software, so if you have please reverse the process if possible.
Can you use System Restore to go back the 3 weeks to before all this started?
If successful please update Windows with ALL updates that are offered by Windows Update and update any other software necessary.
Local support in Spanish would have been easier to negotiate.
Another thing to try....go to Start and in the Search box type services. When services or services.msc appears above click it to open and OK any prompts.
Scroll down the Services panel and when you come to Windows Firewall make sure that service is Started and Automatic.
If it isn't double-click it to open and make it so.
That service must be started to enable any firewall to work.