Why is my computer blocking network access?
100823
If you're using a firewall, disable it. and then start the set up of sharing again. If it still dosent work then its you network hardware problem.\nMost of the cases the firewall blocks sharing.\nIf you have a new versions of firewall, like new software you will have a option Like "Networking". Choose from diff. options.
1173638
Is your windows firewall on? try disabling it?\nTry changing Security in Internet Explore.
254245
simple way is to disable the firewall.check whether u r  allowed to download in "advaced" tab of internet options.else open a port where u can communicate.
127992
alan check your security programs or windows firewall they are probably blocking the installation.
1136605
check your ip config \n(start ->run-> type cmd and then in the box type ipconfig) confirm that you have an ip address, a subnet, and a gateway. The gateway and subnet should be the same for the devices tih differing IP addresses. If that checks out, you may want to look and see if the router or switch is blocking icmp requests. TX
513033
You may have a firewall on your CPU preventing you from downloading certain files.
103576
Do you have a firewall? It might be blocked. You may be able to unblock certain applications in your firewall settings.
409300
you may have blocked out websites through your norton. check your settings.
408188
If you are directly connected to the internet (meaning your computer is directly connected to the modem) your firewall is probably blocking port 80 (which prevents you to access the internet.)  My suggestion is to download (when you have access to the internet) Windows Defender it is free of charge and you can download it from Microsoft.  It is excellent for removing of spyware on a Windows machine (Assuming you are using Windows.)\n\nhttp://www.microsoft.com/downloads/details.aspx?FamilyID=435bfce7-da2b-4a6a-afa4-f7f14e605a0d&displaylang=en\n\nIf, you are on a multiple computer network, then the computer on your network with IP address 192.168.0.1 is infected with a virus/worm and is infecting the rest of the computers.\n\nAlso make sure you have your computer updated from Microsoft.  http://v5.windowsupdate.microsoft.com
993500
Sounds like a firewall blocking access. If firewall is on try disabling it temporarily and then try to reconnect.
818221
download mozilla firefox from www.firefox.com or www.download.com it will fix the problem for sure. If it doesnt then it  must be your internet connection blocking the website from being accessed.
236661
Maybe you have the antivirus on and it may be blocking it.
651467
I think u have installed Windows XP Service pack - 2.It contains built in firewall .. To know more abt the settings goto control panel...
374334
first check you internet connection whether it has been connected or not , if yes check the provided connection port if port is disabled enabled it because you can't access any system behind the firewall protection
638934
the only thing that is definatly the case it that this is a 'weakest link' problem... something in your setup is causing the problem- it could be your processor, ram, os config, network card, router, service, or even just a problem at whatever website you're visiting...
797983
The problem would appear to be with your router/modem router.\nTurn off the mains supply to the router, wait 10 seconds then turn the router/modem router back on again. Wait 10 seconds then try to access the net again.\nIf this doesn't work see if there are any firmware upgrades to download for your router/modem router on the manufacturer's website.\nGood luck
776315
I'm going to assume that you are behind some sort of firewall that is not letting you go to some sites and that you want a way around it. \n\nYou can't get around it without admin privileges.  Find a different computer that is not on the same network.