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This is excellent advice. I especially recommend Malwarebytes.Sounds like Malware, you will need to run a malware scan.
I would recommend downloading the following on another PC:
Trend Micro Housecall + the rootkit buster
www.trendmicro.com/en_us/forHome/products/housecall.html
Malwarebytes
https://www.malwarebytes.com/mwb-download/thankyou/
Hitman (cloud based anti-virus)
https://www.hitmanpro.com/en-us/hmp.aspx
Then running these tools in safe mode - to do so go to settings -> update & security -> recovery -> advanced start up -> safe mode. Also you may need to download updates malwarebytes and definitions for the house call scanner, if that is an issue then I would suggest getting a usb enclosure and placing the laptop's hard drive in that and using another PC or laptop to scan it.
Also I would suggest getting a firewall if you haven't already and if it does turn out to be more nefarious than a hardware based firewall (these can be extremely expensive). It most likely is malware causing redirects and web page loads.
Lastly, anything can be hacked through zero day exploits as no software is truly infallible - The question is do you live constantly worrying about it or just live your lives?
I would say do the malware scans and see it how it goes.
Avira & Malwarebytes are my favorites .
I'm an IT guy also. I fully agree Avira & Malwarebytes, AND SpyBot Search and Destroy for good measure.
That's all well and good and useful advice but the OP also needs to perform a full security audit on all their accounts too. After all, it is usually human error (i.e. weak passwords), that allow for computers to be compromised.
For sure!
, bit late to the party but in addition to the above suggestions, install something like Ublock Origin or Adblock Plus (note not Ublock or Adblock, those are different). Since malware can be spread through modern ads and there are filters to block malware etc. Ublock Origin is easier to setup since the filters to block malware are already included iirc, though I prefer Adblock Plus since non-obstructive and non-dangerous ads are still allowed so you still give websites a fair chance to make some profit of the ads to compensate for their web costs etc. Iirc the anti malware filters for Adblock Plus can be included from their site.Deborah, it is my oh's computer. No he would never speak to anyone on the phone regarding accessing his laptop. He did experience where his internet kept throwing up multiple web pages at once which he did not request.