Uninstalling other antivirus software

Before installing Avast Antivirus software, ensure no other antivirus software including expired or trial versions are installed on your PC. When multiple antivirus programs are installed on one PC, conflicts such as false-positive detections, performance degradation, and system instability occur.

Most vendors offer special removal tools to completely uninstall their antivirus software from your system. If available, such tools are the preferred mode of uninstallation because uninstalling programs via the Windows Control Panel may leave files behind which prevent Avast Antivirus from being installed correctly.

Uninstall other antivirus software

Refer to the alphabetical list below to access the websites of common antivirus programs for uninstallation instructions. If the antivirus program you are trying to uninstall is not in the list, refer to the program's support website.

A | B | C | D | E | F | G | K | L | M | N | P | Q | S | T | U | V | W | Z

A

• adaware antivirus software uninstallation
• AVIRA antivirus software uninstallation
• AVG antivirus software uninstallation

B

• Baidu antivirus software uninstallation
• BitDefender antivirus software uninstallation
• BullGuard antivirus software uninstallation

C

• CA / Total Defense antivirus software uninstallation
• Comodo antivirus software uninstallation
• Cyber Defender / Early Detection Center / USTechSupport antivirus software uninstallation

D

• Dr. Web antivirus software uninstallation (for registered Dr. Web users only)

E

• Early Detection Center / USTechSupport / Cyber Defender antivirus software uninstallation
• eScan antivirus software uninstallation (removal tool download only)
• ESET antivirus software uninstallation

F

• F-Prot / FRISK antivirus software uninstallation
• F-Secure antivirus software uninstallation

G

• G DATA antivirus software uninstallation

K

• K7 antivirus software uninstallation
• Kaspersky antivirus software uninstallation

L

• LavaSoft adaware antivirus software uninstallation

M

• McAfee antivirus software uninstallation
• Microsoft Windows Security Essentials antivirus software uninstallation

N

• Norton antivirus software uninstallation

P

• Panda antivirus software uninstallation
• PC Tools antivirus software uninstallation

Q

• Qihu 360 antivirus software uninstallation
• Quick Heal antivirus software uninstallation

S

• Security Essentials antivirus software uninstallation
• Sophos antivirus software uninstallation
• Spybot Search & Destroy antivirus software uninstallation
• Sunbelt / VIPRE antivirus software uninstallation

T

• Total Defense / CA antivirus software uninstallation
• TrendMicro antivirus software uninstallation

U

• USTechSupport / Early Detection Center / Cyber Defender antivirus software uninstallation

V

• VIPRE / Sunbelt antivirus software uninstallation

W

• WebRoot antivirus software uninstallation
• Windows Live OneCare antivirus software uninstallation (removal tool download only)
• Windows Security Essentials antivirus software uninstallation

Z

• ZoneAlarm antivirus software uninstallation