Certificate errors on all browsers ( chrome,Firefox,edge,ie)


1. err_cert_authority_invalid on chrome
This connection is not private on edge, chrome
Http 500 on internet explorer

2.Automatically some web pages open up (amazon ,snapdeal,evo trackr, onclickads )
3.And sometimes Skype is installed without my permission.
4. System security is disabled after login even if I turn it on it goes to disabled mode, defender turns off

Attempted solutions:

I have no problems with my date and time ,it is set as per internet and it is accurate.

Extensions: no recent extension,removed all of them

I even installed adwcleaner, avast pro,malwarebytes and removed all possible threats.
I tried all these in safe mode also

Please someone suggest a solution without reinstalling my windows 10

Discussion is locked

Reply to: Certificate errors on all browsers ( chrome,Firefox,edge,ie)
PLEASE NOTE: Do not post advertisements, offensive materials, profanity, or personal attacks. Please remember to be considerate of other members. If you are new to the CNET Forums, please read our CNET Forums FAQ. All submitted content is subject to our Terms of Use.
Reporting: Certificate errors on all browsers ( chrome,Firefox,edge,ie)
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
- Collapse -
safemode with network
- Collapse -
lenovo s510p

i tried safemode with networking, but i cannot connect to internet.
after diagnosing it says " network diagnostics cannot be run on safe mode"

- Collapse -
Items 2 and more tell me some spyware or worse is installed.

CNET Forums

Forum Info