no firewalls is a bad idea. do you have antivirus software. some malware viruses prevent browsers from working. malwarebytes.org has a good malware remover

True, but have to be careful if new to their usage, as many a home user ends up partially disabling rather than actually learning how to use them effectively... which ends up offering little protection. Needs to be easy to use with reasonable documentation.

Personally I like the firewalls bundled in either Endpoint or Comodo's internet protection suite, as both pretty user friendly.