On this Registry entry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify (Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> No action taken.
This Registry key controls warnings about your AntiVirus software being out of date, not installed, etc.
If the value is set to 1 you don't get any warnings.
On the other side of the coin, malicious software can prevent notifications that your AV is disabled from happening, so that you do not know about the action.
Did you disable notifications in your Security Center?
Do you have any kind of software that may be preventing this?
Let's do the scan that follows. You will need to use Internet Explorer for this scan.
Download ESET Online Scanner:
Press the ESET Online Scanner download button
[*]Allow the ActiveX to download, and click 'Install':
[*]Make sure that the option Remove found threats is unticked/not checked!
[*]Click Scan, and wait for the scan to finish
[*]If any threats are found, click the 'List of found threats', then click 'Export to text file...'
[*]Save the file to your Desktop as: ESET Scan
Please provide the contents of ESET Scan in your reply.
Retired - Doin' Dis, Dat, and slapping malware.
Malware Eliminator/ Member of UNITE and the
Alliance of Security Analysis Professionals