AVG may be acting "weird" because your also running Norton.
Using more than one anti-virus program is not advisable
regardless if the second is used as a stand-alone on demand scanner. Even when one of them is disabled, it can affect the other. Issues can arise when the active anti-virus detects the non-active one's definitions or quarantined files.
The primary concern with using more than one anti-virus program is due to conflicts that can arise when both are running in real-time mode simultaneously
. Anti-virus software components insert themselves into the operating systems core and using more than one can cause instability, crash your computer, slow performance and waste system resources
. When actively running in the background while connected to the Internet, they both may try to update their definition databases at the same time. As the programs compete for resources required to download the necessary files this often can result in sluggish system performance or unresponsive behavior.
Each anti-virus will often interpret the activity of the other as a virus and there is a greater chance of them alerting you to a "False Positive
". If one finds a virus and then the other also finds the same virus, both programs will be competing over exclusive rights on dealing with that virus. Each anti-virus will attempt to remove the offending file and quarantine it. If one finds and quarantines the file before the other one does, then you encounter the problem of both wanting to scan each other's zipped or archived files and each reporting the other's quarantined contents. This can lead to a repetitive cycle of endless alerts that continually warn you that a virus has been found when that is not the case.
Anti-virus scanners use virus definitions to check for viruses and these can include a fragment of the virus code which may be recognised by other anti-virus programs as the virus itself. Because of this, most anti-virus programs encrypt their definitions so that they do not trigger a false alarm when scanned by other security programs. However, some anti-virus vendors do not encrypt their definitions and will trigger false alarms if used while another resident anti-virus program is active.To avoid these problems, use only one anti-virus solution
. Deciding which one to remove is your choice. Be aware that you may lose your subscription to that anti-virus program's virus definitions once you uninstall that software. Most anti-virus vendors recommend that you install and run only one anti-virus program at a time
advises the same for their systems.
When necessary, you can always get another opinion by performing an Online Virus Scan
SmitfraudFix is not a virus or malware. It is a tool to detect and remove smitfraud infections. However, certain files that are part of the tool, such as process.exe, restart.exe, SmiUpdate.exe, ws2fix.exe, reboot.exe, IEDFix, VACFix and GenericRenosFix may at times be detected by some anti-virus/anti-malware scanners as a "RiskTool
", "Hacking tool
", "Potentially unwanted tool
", or even "malware (virus/trojan)
" when that is not the case.
These detections do not necessarily mean the file is malware or a bad program. It means it has the potential
for being misused by others. Anti-virus scanners cannot distinguish between "good" and "malicious" use of such programs, therefore they may alert you or even automatically remove
them. In these cases, the detection is a "False Positive
For Spybot alerts on Windows Security Center read the discussion here
and see the FAQ: Why does Spybot-S&D flag changes in the Windows Security Center?