A word of advise: Do not have more than 1 Anti-Virus on your PC running at 1 time. U can have as many as u like, but b sure that only 1 is enabled. The problem with running more than 1 at the same time is, compatibility, non-detections, and false positives. Now, u can run 1 Anti-virus and say 2 Anti-Spywares with no problems. I always recommend AVG Free or Pro Anti-Virus (Beware of fake Anti-Virus 2009), and Malwarebytes Anti-Malware. If u r running Vista on your PC u should already have Windows Defender, which is OK. Secondly, it sounds like 1 of your internet browsers is corrupt. I would run a Systems restore back 2 the day b4 your problems began. Once created, then run a full system scan with your Anti-Virus. B sure 2 update your Anti-Virus b4 u run a scan. C if this nfo helps u.........Good Luck!!!!!!!

I have the same problem, i was using internet just fine and then just suddenly stopped, i tried to restore system but it tells me it can't be done..i have tried every single possible solution i can find but nothing has worked =(, the weird thing is it just works for like 5 to 10 mins and then i all the browsers go blank...HELP MEEEEEE

From what I've gathered, both Avast and Zone Alarm create browser problems. I strongly recommend AVG Free. In my opinion, it's the best and most of all it's FREE. Now, my guess is that your browser's been hijacked or corrupted, so here's some nfo 4 u 2 follow. C if it helps u any:

The following six tips can help restore your browser's settings:

1. Stop cascading pop-up windows.

If a seemingly endless number of pop-up windows appear on your screen, you'll probably want to stop the deluge first. To do this in Microsoft Windows Vista, Windows XP, or Windows 2000 while using Internet Explorer:

1.


Press CTRL+ALT+DEL, click Task Manager, and then click the Processes tab.

2.


Click IEXPLORE.EXE, and then click the End Process button.

This closes all instances of Internet Explorer. Then you can re-open the program to continue browsing as usual. To help prevent future attacks, you should also have a pop-up blocker turned on. To turn on the pop-up blocker in Internet Explorer 7:

1.


Click Tools menu, click Internet Options, and then click the Privacy tab.

2.


In the Pop-up Blocker box, select the Block pop-ups check box. Click OK.

If you still experience the other effects of a hijacked Web browser, try the following:

2. Install preventive software such as the kinds mentioned in the preceding Preventing browser hijacks section. Many browser hijacking programs can be identified and removed by downloading, installing, and running these programs.

3. Run the malicious software removal tool. This can catch some, but not all, kinds of hijacking software.

4. Reset Internet Explorer settings. If you're using Internet Explorer and your home page has been changed, you can often reset it yourself.
•

Close any Internet Explorer or Windows Explorer windows that are currently open.
•

Open Internet Explorer.
•

Click Tools, and then click Internet Options.
•

Click the Advanced tab, and then click Reset.
•

In the Reset Internet Explorer Settings dialog box, click Reset.
•

When Internet Explorer finishes restoring the settings, click Close, and then click OK.
•

Close Internet Explorer.

Your changes will take effect the next time you open Internet Explorer.

5. Disable add-ons. Many browser hijackings come from add-ons, also known as ActiveX controls, browser extensions, browser helper objects, or toolbars. These items can improve your experience on a Web site by providing multimedia or interactive content, such as animations. However, some add-ons can cause your computer to stop responding or display content that you don't want, such as pop-up ads.

To learn how to disable add-ons in Windows Vista or Windows XP Service Pack 2 (SP2), read How do browser add-ons affect my computer?

6. Removing unwanted programs with the Add/Remove feature

If you're ready to try some advanced removal methods, the Microsoft Help and Support article Unexplained computer behavior may be caused by deceptive software provides additional steps you can take, including how to use the Add/Remove feature, the built-in program remover, and the program finder in Windows Explorer.

7. Empty the Recycle Bin when you've finished these steps, especially if you've removed an unwanted program. Then restart your computer.

There is a very easy way to find out if it's a hardware problem or a problem with windows. Get a Linux Live Cd boot up linux live if there is no problems with the internet or hardware then you know its a software problem.

I have the same problem, like the 10 or 15 people here.
I used Vista, I used Mozzila always, after 30 to 90 mins (it varies) the browsers work but the internet is off.
But strangely Skype stills works online and Outlook Express depends, sometimes yes, sometimes no.

Shutting down the ZoneAlarm does not work. I don't think it is the firewall.
I have tried another browser like Chromes, and still don't get any webpages.
I have noticed that sometimes this happens just after the internet cable got off by touching, while browsing, or some webpage did not load, or Mozzile just freezes for a second.
Therefore, I feel that this a browser-related problem, common to Mozzila and Chrome!!!

Only restarting the computer, works.

I too have suffered this prooblem on my Vista PC recently but now it has gone away! Note that my XP laptop has continued to work with no problems. Both were running Zonealarm firewall (the free version).
I recalled a similar problem a couple of years ago so I uninstalled Zonealarm and my PC browser is now working fine.
I'm now relying on Windows Firewall but will reload Zonealarm when I hear that they've fixed the problem.