My windows 8.1 installation has many problems, most of which are browser-related, but even windows related. For example, if I set firefox as my default browser, it won't save this setting at all, if I double click a file that should open with firefox, it will actually open with chrome.

Also, all of my browsers have problems loading pages, for example when I try to login to sites that use steam api, I will get some cookies error or smth, here's what I get when trying to "sign in with steam" using opera on
Location: https://steamcommunity.com/openid/lo...ail%2Cfullname X-UA-Compatible: IE=Edge,chrome=1 Cache-Control: no-cache, private Set-Cookie: _dotabuff_session=BAh7C0kiD3Nlc3Npb25faWQGOgZFVEkiJTQ4OWYxNWQ3ZjRiNTMyZDBlMWY2MDI4ZWRmOWNiMmUwBjsAVE kiGHVzZV9kYXRhYmFzZV9tYXN0ZXIGOwBGVEkiFG9tbmlhdXRoLnBhcmFtcwY7AFR7AEkiFG9tbmlhdXRoLm9yaWdpbgY7AFQiGW h0dHA6Ly9kb3RhYnVmZi5jb20vSSI9T3BlbklEOjpDb25zdW1lcjo6RGlzY292ZXJlZFNlcnZpY2VzOjpPcGVuSUQ6OkNvbnN1bW VyOjoGOwBUbzopT3BlbklEOjpDb25zdW1lcjo6RGlzY292ZXJlZFNlcnZpY2VzCToSQHN0YXJ0aW5nX3VybEkiJWh0dHA6Ly9zdG VhbWNvbW11bml0eS5jb20vb3BlbmlkBjsAVDoPQHlhZGlzX3VybEkiJWh0dHA6Ly9zdGVhbWNvbW11bml0eS5jb20vb3BlbmlkBj sAVDoOQHNlcnZpY2VzWwA6DUBjdXJyZW50bzoiT3BlbklEOjpPcGVuSURTZXJ2aWNlRW5kcG9pbnQMOhBAY2xhaW1lZF9pZDA6EE BzZXJ2ZXJfdXJsSSIsaHR0cHM6Ly9zdGVhbWNvbW11bml0eS5jb20vb3BlbmlkL2xvZ2luBjsAVDoPQHR5cGVfdXJpc1sGSSIsaH R0cDovL3NwZWNzLm9wZW5pZC5uZXQvYXV0aC8yLjAvc2VydmVyBjsAVDoOQGxvY2FsX2lkMDoSQGNhbm9uaWNhbF9pZDA6EEB1c2 VkX3lhZGlzVDoYQGRpc3BsYXlfaWRlbnRpZmllcjBJIi5PcGVuSUQ6OkNvbnN1bWVyOjpsYXN0X3JlcXVlc3RlZF9lbmRwb2ludA Y7AFRAEg%3D%3D--2cf94a9cb003ce052fd1977a0ebd2a683dc10478; domain=.dotabuff.com; path=/; HttpOnly X-Request-Id: e7ce77c59f0344335ab1c718920b9f3e X-Runtime: 0.624203 X-Rack-Cache: miss 0
The above thing happens on all my browsers, and on many websites, especially on eBay. The curious thing is, I use avast as my antivirus, and on my avast safezone browser (that is chrome), things work perfectly fine, so in that "virtual system" everything works fine, while chrome normally doesn't work fine on my main installation.