You should have received an email with details about the connection that was blocked and the reason. Though your computer is blocked, your IU account is not blocked. You can go to a Student Technology Center for any of your computing needs.
To recover from this compromise it is necessary to completely rebuild the infected computer. When a computer is compromised in this manner, anything on the system can be modified and/or monitored by someone else.
When you are finished and wish to have network access restored, please reply back to the notification email message, leaving the subject line intact, and outline specifically what actions you took. You must take all actions listed in order for us to restore access.
Help with these steps can be obtained from the KB article titled In Windows, how do I rebuild my computer after a system-level compromise?
1. Remove the computer from the network by removing the network cable from the computer, or by turning off the wireless or dialup connection. Do not reconnect the computer until all steps have been completed, or you run the risk of being compromised again.
2. Backup your personal files. If you do not take this step, you will lose all of your data when you perform step #3.
3. Perform a New Install of Windows XP. If your Windows XP CD says "with Service Pack 2" you can skip step #4. Make sure you use a new password for the Administrator account when setting up Windows. When you reboot the machine, you should allow automatic updates when prompted, which is the recommended action.
4. Install Windows XP Service Pack 2. It can be obtained from the Support Center or by using an alternate computer to download and burn the service pack. Do NOT attempt to download it using the blocked computer. After installation, the system will require a reboot. When it does, you should allow automatic updates when prompted, which is the recommended action.
5. Install anti-virus software. Symantec AntiVirus is available on the IUware CD, and is configured to update virus patterns daily. If you do not use Symantec AntiVirus, make sure your software is configured to update daily.
If you have any questions about these instructions, need help obtaining the IUware CD, Service Pack 2, or Windows XP, or would like assistance with the process, please consult with your Local Support Provider (LSP). If you do not have an LSP, please call the UITS Support Center at 855-6789 (IUB) or 274-4357 (IUPUI). Email: ithelp@iu.edu
Please do not call or email the IT Security & Policy Office for support. Instead, contact the Support Center for assistance. Only email it-incident@iu.edu when you have completed these steps and are ready to get back on the network.
Thank you for your immediate attention to this important matter. Please remember in your reply to outline each step you took. Simply replying with "I have completed all steps" is not enough.