Antivirus Scanner Software
Where to get it
This is a list of free antimalware scanners that are readily available on your PC, on the Internet, or can be downloaded and installed on your PC.
On your Windows PC:
Microsoft Malicious Removal Tool
If Windows Update is turned on to automatically download and install Windows Updates then a recent copy of the Microsoft Malicious Removal Tool is present on your PC.
To use the MRT scanner simply enter MRT into the Search box, either in the Start Menu or in the Start Sceen. MRT should be the top or near the top choice.
IMPORTANT! Run the MRT with Administrator privileges - right-click MRT then chose RUN AS ADMINISTRATOR from the context menu.
If you have no antivirus scanner software installed this is much better than nothing.
On the Internet
Microsoft Safety Scanner
Eset on-line scanner
F-Secure Online Scanner for your PC
Trend Micro Housecall
Simply go to the page(s) and start the scanner(s).
Note: One or more of these online scanners may require that Oracle Java is installed on your PC or that files be downloaded to your PC.
AntiVirus/Antimalware Scanner Software
(to be downloaded and installed)
Malwarebytes site installs Trialware version which will become a free version in 14 days if you do not upgrade to paid version.
Filehippo Also Trial Version
Note: Ninite will install the free version without trialware. When installing from a download from Malwarebytes site or Filehippo be sure to uncheck the trial version box within the installer or Malwarebyte will eventually ask for payment then quit working if no payment is made.
Note: Be sure to choose the FREE version from the SuperAntiSypware site.
Bleeping Computer site
Also see Bleeping Computer's Security Utility downloads page for other antivirus/antimalware scanning tools.
Kaspersky's Page of Free Recovery Tools
The Windows Club has a fairly comprehensive list of virus scanners.