1.    21 Feb 2016 #1
    Join Date : Feb 2016
    Posts : 4
    Windows 10

    Avast Antivirus Problem


    Hi,
    I have a desktop PC and recently installed windows10 OS
    Then when that was up and running I went to install an antivirus. I wasn't aware that Windows Defender was part of the package and so I went to look for an antivirus program.
    I like Chome browser and read that Avast was the best option with this browser.

    Now in the days of old, it was always a safe bet to go to download.com/CNET to download free programs as they could almost guarantee the stuff was clean. No I find out this is no longer true!
    The first surprise was that Defender blocked my efforts to install Avast saying 'this is a malicious file' - so I went via this website to what I thought was Avast web page (still think it was) but ever since I downloaded Avast free version I have had nothing but problems!
    The main issue has been that it has blocked all access to the Internet, then my PC doesn't boot up normally as it did before and it hangs midway and requires me to come back and press F1.

    I have since uninstalled Avast but all the problems have remained behind. And I began to think it may be an infected file so I ran windows defender which didn't come up with anything, except those three items which were quarantined but were invisible so I don't know where abouts they are,or if I should worry about the warning pop ups I received.

    I also ran Malwarebytes but it came up with nothing.
    I don't know if I have a virus or not, but ever since I installed Avast my PC is is being prevented from connecting to the Internet so its rendered useless!

    Help needed
      My ComputerSystem Spec
  2.    21 Feb 2016 #2
    Join Date : Oct 2014
    In a house with a crazy cat trying to kill me
    Posts : 17,456
    Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition

    Nowadays it's a good idea to stay away from hosting sites like CNet & others. Most of them run an installer that like to add unwanted extras to the your OS.

    Depending on how badly your OS is compromised, you may want to consider doing a refresh.

    Refresh Windows 10 - Windows 10 Forums

    If you want to attempt to clean it out, malware scanners you can run are Malwarebytes (the free version will work fine) & AdwCleaner. BTW, you can trust any d/l's from Bleeping Computer, they are a safe site that does not try to hijack your PC with unwanted crapware.

    It wouldn't hurt to run RKill before you do a scan with MBAM or AdwCleaner. Do NOT reboot after running it.

    RKill Download

    As RKill only terminates a program's running process, and does not delete any files, after running it you should not reboot your computer as any malware processes that are configured to start automatically will just be started again. Instead, after running RKill you should immediately scan your computer using some sort of anti-malware or anti-virus program so that the infections can be properly removed.
    Also, anytime you uninstall a AV, be sure to use the AV's uninstaller to make sure you get it completely out of your system. Only leftover orphan files can cause problems down the road. You can find a list of AV uninstallers here.

    Uninstallers (removal tools) for common Windows antivirus softwareESET Knowledgebase
      My ComputerSystem Spec
  3.    21 Feb 2016 #3
    Join Date : Aug 2015
    Maine
    Posts : 40,222
    Windows10Pro 64Bit

    REVO Uninstaller the Free version is also a VERY good choice, as it also checks registry for leftovers from the app.
      My ComputersSystem Spec
  4.    21 Feb 2016 #4
    Join Date : Feb 2016
    Posts : 4
    Windows 10
    Thread Starter

    Quote Originally Posted by Borg 386 View Post
    Nowadays it's a good idea to stay away from hosting sites like CNet & others. Most of them run an installer that like to add unwanted extras to the your OS.

    Depending on how badly your OS is compromised, you may want to consider doing a refresh.

    Refresh Windows 10 - Windows 10 Forums

    If you want to attempt to clean it out, malware scanners you can run are Malwarebytes (the free version will work fine) & AdwCleaner. BTW, you can trust any d/l's from Bleeping Computer, they are a safe site that does not try to hijack your PC with unwanted crapware.

    It wouldn't hurt to run RKill before you do a scan with MBAM or AdwCleaner. Do NOT reboot after running it.

    RKill Download



    Also, anytime you uninstall a AV, be sure to use the AV's uninstaller to make sure you get it completely out of your system. Only leftover orphan files can cause problems down the road. You can find a list of AV uninstallers here.

    Uninstallers (removal tools) for common Windows antivirus softwareESET Knowledgebase
    Thanks for the good advice!
    I will have to find another computer first before I can access the Internet - I cannot think why IE and Chrome are being prevented from connecting to the Internet but without this facility, of course I can do nought.
      My ComputerSystem Spec
  5.    21 Feb 2016 #5
    Join Date : Feb 2016
    Posts : 4
    Windows 10
    Thread Starter

    Quote Originally Posted by OldMike65 View Post
    REVO Uninstaller the Free version is also a VERY good choice, as it also checks registry for leftovers from the app.
    Thank you for this good suggestion!
      My ComputerSystem Spec
  6.    21 Feb 2016 #6
    Join Date : Oct 2014
    In a house with a crazy cat trying to kill me
    Posts : 17,456
    Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition

    More then likely there is a internet security firewall driver in place put there by Avast to scan incoming/outgoing traffic for malware activity. If you did not install the AV all the way, that driver may still be in place & is preventing a connection. Navigate to your Local Area Connection Status, click on properties & see if such a program is still there (i.e., Avast Internet Security Firewall driver). If such a program is listed & still checked, uncheck it & see if you can get online.

    There is also a diagnose button which may find the solution.

    The same thing happens when Comodo is improperly removed, it leaves a firewall driver that limits connections/blocks some until it is removed.
      My ComputerSystem Spec
  7.    21 Feb 2016 #7
    Join Date : Feb 2016
    Posts : 4
    Windows 10
    Thread Starter

    Quote Originally Posted by Borg 386 View Post
    More then likely there is a internet security firewall driver in place put there by Avast to scan incoming/outgoing traffic for malware activity. If you did not install the AV all the way, that driver may still be in place & is preventing a connection. Navigate to your Local Area Connection Status, click on properties & see if such a program is still there (i.e., Avast Internet Security Firewall driver). If such a program is listed & still checked, uncheck it & see if you can get online.

    There is also a diagnose button which may find the solution.

    The same thing happens when Comodo is improperly removed, it leaves a firewall driver that limits connections/blocks some until it is removed.
    Oh yes, this does sound a very likely possibility.
    Thanks so much!
    I will look out for this tomorrow, and get back to you, hopefully with good news...
      My ComputerSystem Spec
  8.    21 Feb 2016 #8
    Join Date : Jul 2015
    Poole Dorset UK
    Posts : 2,567
    Windows 10 x64 Home Version(1709) Build16299.125

    Quote Originally Posted by Wish2learn View Post
    Thank you for this good suggestion!
    OldMike65 beat me to it as it was him that recommended it and I would use no other.
    Make sure you find all traces of Avast and let Revo uninstall it
      My ComputerSystem Spec

 


Similar Threads
Thread Forum
Latest version of Avast Antivirus
Latest Version of Avast Antivirus Released WHQL Version: 17.7.2314 (free version) Release Date: October 4th 2017 Release Notes What's new:
AntiVirus, Firewalls and System Security
Can't boot to Windows 10 after uninstalling Avast antivirus.
Hi i uninstalled avast free after noticing it run worse on windows 10. After I removed it via control panel I let my computer reboot. It was unable to boot and i got caught in a "Automatic Repair Restart Loop" I went to the Advanced options in...
AntiVirus, Firewalls and System Security
Avast says its on, but not according to Windows
my mistake, please delete:)
AntiVirus, Firewalls and System Security
Fake Avast! Antivirus vs Windows XP and Windows 10
Windows 10 actually fared much better than XP, although it was still rendered unbootable. That's why we have User Account Control, for the UAC haters. https://www.youtube.com/watch?v=OKAkwk9iJNg
Chillout Room
Solved Cannot unistall avast.
So i upgraded to windows 10 from windows 7. I had as antivirus avast, now i want to unistall it but windows is coming up with an error "this program has compatibility issues. So what can i do now?
AntiVirus, Firewalls and System Security
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 12:53.
Find Us
Twitter Facebook Google+ Ten Forums iOS App Ten Forums Android App



Windows 10 Forums