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Yesterday, a friend told me that he wanted to uninstall Avast antivirus program for AVG to be installed. But Avast does not appear in the Program list of Add or Remove Programs control Panel on the start list. So how do I know and uninstall the Avast program thoroughly ? This section is explained. https://antivirus-2020.com/avast-2020/ First of all, reinstall the Avast of newer version and uninstall it with Add or Remove Programs utility in the safe mode as the instruction as listed below:

Keep pressing the F8 key after reboot your computer and choose the "safe mode" option to get into the safe mode of your system.
klik "Menu Start " kemudian pilih "Control Panel ".
Open Add/Remove Programs.
Find and highlight Avast in the programs list.
Click " Change/Remove" button to remove it from your computer.
Follow the on-screen steps to finish the uninstall process.

Second of all, find out and manually delete t the directories in C disk as listed,

C:Program FilesAlwil Software.

C:WINDOWSTemp

C:WINDOWSPrefetchAVAST.SETUP-032170A8.pf

C:WINDOWSPrefetchAVAST.SETUP-1211A67D.pf

C:WINDOWSPrefetchAVAST_HOME_SETUP.EXE-2EA6EB57.pf

Finally, manually delete the related registry keys as listed below by opening up the Registry Editor( type in " regedit" after select "Run" in the Start menu) and expand the list under HKEY_CURRENT_USERSoftware:

HKEY_CURRENT_USERSoftwareALWIL Software

HKEY_CURRENT_USERSoftwareALWIL SoftwareAvast

HKEY_LOCAL_MACHINESOFTWAREALWIL Software

HKEY_LOCAL_MACHINESOFTWAREALWIL SoftwareAvast

However, if you are not so sure how to follow the three steps above to remove all the Avast products or find it too difficult and complicated to reinstall the newer version or so the turnaround process.