Nakkali kanchi, Here is a small checklist you can try: Check for physical connectivity. Is the network cable plugged in securely on the wall as well as the back of your computer? Unplug and reconnect securely. Does the little LED light up when you machine is on? Yes/No. If yes, half your battle is over. If not, uh oh, possible network cable or network port issue. Try another cable/network port. [It could also be network card failure, call for warranty support from hardware vendor]. Assuming you are running Windows XP, on the tray near the bottom right of your screen where you see the time display, do you see the network icon? [The network icon is a picture of two computers] If visible, does the network icon display a red X on it? If so, go to Start, control Panel, Network and Dialup connections, double click to open, Right click on Local Area Connection and Select Enable. The network tray icon should light up and the red X should disappear. If the above is not true, then it could indicate other problems. Could you please provide more information on the behaviour your machine presently exhibits? Its very difficult to diagnose the probable cause of the problem afflicting your computer and advocate a possible solution without clearer and more detailed information from you. However, a line in your posting "network violation error" caught my eye. This could indicate that your campus IT dept. has blocked your machine from connecting to the network. To check for this, if your computer is running Windows XP, right click on the taskbar (the grey bar at the bottom of the screen), and on the menu that appears, select Task Manager. On the window that appears, click on the Processes tab (below the Menu bar that says File, Options, View etc.). On the list of processes currently running, check if you see ALG.EXE and Launch32.exe. If you see ALG.EXE as a running process, it indicates that your machine is functioning as a gateway, used by malicious programs on your machine to attack other computers. One result would be a huge amount of network traffic being generated by your machine and flooding your local network. Causing your campus network administrator to block network access for your machine. If you see Launch32.exe on the proccesses, it indicates possible spyware/adware infestation. To my knowledge, almost all commercially available anti-virus programs are ineffective against spyware/adware. [It takes a firewall to block unauthorized traffic to/from your machine. The McAfee security suite has this feature, but not the Symantec Anti-virus you have installed.] Possible solutions: Given your search for help here, I take it you haven't the skills to shut down Services on your machine. If you want to take a chance, here is what you can do: Change the paramenters of the local gateway service [from Control Panel, Administrative Tools, Services, then select Local Gateway Services, right click on it, select Properties] so that its properties are changed to Disabled. However, you must login as a user with Local Administrator rights to do this. If in doubt, refrain from attempting this. If your roomate's computer has a CD-writer and you have access to a blank CD, you can download Adaware and burn it to a blank CD. Then use that CD to install Adaware on your computer, proceed to irun that program to clean out your machine. Here is where you can get Adaware. http://www.download.com/3000-2144-10045910.html?part=69274&subj=dlpage&tag=button If the above two things doesn't do the trick, you really are up the creek without a paddle. The ultimate is to delete the HD's existing partition, re-create the partion, re-format the HD then re-install the OS and all the applications. Then ask your campus IT dept. to re-connect you to the network. Of course, first backup your data on CDs before doing any of the above. Good luck.