Still need to look at the results of
Security Check, however, in any event, you may want to change
all passwords, in particular to bank accounts and credit cards. Also include passwords used to access websites on the Internet.
Use a different and clean computer to do so, and use passwords that are difficult to figure out.
Download and install an
AntiVirus program and an anti-malware program like
Malwarebytes-AntiMalware, before connecting to the Internet again.
Use the
Windows Firewall, or download a free one:
ZoneAlarm Free Firewall
Best Free Firewall
Outpost Firewall Free
Best Free Firewall
Online Armor Free
Best Free Firewall
A Firewall monitors your system's communication between your network and the Internet and helps stop intrusions and attacks.
If you do a Google search, there may be other free Firewalls available. Also, someone here might suggest one.