Hello,
Sicne I download Avast 5 I cant connect to the internet on my computer. I deleted it and it connected imidiatly.
Do I need to change some settings?
Thanks 
what antivirus did you have before avast ?
was the computer delivered with a preinstalled AV when new ?
have you uninstalled it ?
have you used a removal tool to remove all leftovers after the uninstall ?
removal tools can be found here http://uninstallers.blogspot.com/
I had AVG. I uninstall it from the control panel
Someone gave me a link for changing the settings of AVAST but it was for version 4 and but didnt find for version 5.
I had similar problem with AVG too but it usually connected after few restarts but with AVAST even after several restarts it dosent connect.
What was this “link” someone gave you? Please post it, but sanitize it by editing the first letters to read “hXXp”.
(This will make it a non-link.)
Try running the removal tool for AVG. Link in Pondus’ post.
Any other symptoms of computer misbehaviour?
hxxps://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=25&nav=0,66
that is the only problem I had with it
I ran the AVG removal tool =]
What firewall do you use?
the firewall that comes with the windows
I suggest an uninstall and removal, followed by a complete reinstall.
Download these files first: The setup file (52MB)
Avast uninstall utlity.
Save them to your desktop.
Go offline.
Remove Avast via add/remove programs in the control panel. Reboot. (If there were any problems with the removal reboot into safe mode.
Run the Uninstall utility. Reboot.
Run the installation file. Reboot as prompted. A second reboot may be necessary, if the Avast icon does not appear normal in the system tray.
Go online again, allow it to updated, register the program.
Did it, still doesnt connect :-
Maybe I need to change settings somewhere?
Could be a settings issue, but we probably need a bit more info.
Did you have to disable Avast to download the files I linked you to?
How does your computer connect to the net normally?
What is the Operating System, and the make of the computer? Desktop or laptop?
Can you connect at all, using any program, or is it completely disabled, when Avast is running? (What programs have you tried to connect with. I’m assuming just a browser.) Other programs that require net access are Avast itself, for updates, and an email client, like Outlook Express, for example. Please try manually updating Avast and see what happens.
I uninstalled Avast because I cant connect with it.
The computer connects Automatically when I open it.
I have windows 7, its a desktop.
I dont have any program it suppose to connect automatically and with Avast I cant connect at all.
It’s a wireless connection? Or cable?
There are programs that require a connection, and let you know if the connection is absent. So, for example, for browsing the web, you’d use Internet Explorer. (Or Firefox. Or Google Chrome.) For email you might use Outlook. Or Thunderbird.
Get the idea?
Which of these won’t connect with Avast installed?
Have there ever been Norton or Symantec programs on the computer?
And once again, what is the make of the computer?
Its cable connection.
The explorer didnt work. (messenger, skype didnt work too)
I never had Norton or Symantec.
I dont know the make of the computer, can I chack this somehow?
Time to check for malware, methinks.
Download MBAM (the free version) and install it. Update it, and run a quick scan. At the end of the scan a report will be produced. Select everything found and click “remove selected”. If it prompts to reboot, do so promptly.
Post the scan report with your next reply. It can be accessed as a text file from the MBAM interface. you may need to cut and paste it into two replies if it’s too large.
Corrected link above.
The page for MBAM should look like this.
I did the scan, it found only 1 infected file and I deleted it.
the scan report is in russian so I wont post it
What sort of infection was it? I don’t mind if you post the file name/path/detection in Russian. That’s what Google translate is for. 
I’m a bit lost, frankly. Try installing Avast again, if you’re still keen, and under settings>updates>proxy settings check that you have “direct connection” selected.
I don’t know how the Windows 7 firewall interface looks, nor what is possible with it, but if it’s like a lot of other firewalls, maybe it contains Avast entries created as rules?
You could try altering these if possible, or deleting them after installing Avast, to see if it re-creates them correctly.
It was a: keygen.exe (Trojan.Agent)
I will try to install now/
what do you meen by ‘Avast entries created as rules’?
Most firewalls create rules for applications when the firewall detects an application.
I don’t know if the Windows 7 firewall does this; I only use the XP firewall which has no outbound control. SO it is something worth checking.
What folder was the keygen found in?
it was in documents and settings.’
i installed it again and selected direct connection and it still dont connect =
i tried to look at the firewall settings and I didnt understad anything
I think it is connected to the settings, just have to find which one