Hi pmiller,
From your description, I keep getting the feeling that your computer may be being re-infected. I am paranoid, I admit it. But there are some threats that can be pretty sneaky and can spread via network shares. This means just connecting to the Internet can cause the threat to infect the computer.
Because of this, it is important that you follow these steps to run a full system scan in Safe mode:
1. Download the latest virus definitions via the Symantec Web site (these definitions are the most current)
Title: 'How to update virus definition files for Norton 2008 product using Intelligent Updater'
Document ID: 2007090100014179
> Web URL: http://service1.symantec.com/SUPPORT/norton2008.nsf/docid/2007090100014179
2 Start your Norton program.
3 On the Norton product tab, click Settings,
4 Under Basic Security, click AutoProtect and then click Configure.
5 Check Load Auto-Protect during system startup.
6 Click Apply.
7 In the left pane, click Exclusions.
8 In the left pane, click Low Risk Exclusions.
9 Under "How to respond when a low security risk is found", click Automatically remove low-risk items.
10. Click Apply and then click OK.
11. Unplug your network cable or your wireless modem. You should not be connected to the Web during this process to avoid re-infection via network shares.
12. Restart in Safe mode and run a Full System Scan (not a Quick Scan!!)
12. Restart in Normal. AP will scan on startup.
13. Open your Norton program and run one more Full System Scan.
14. If nothing is detected, plug your network cable back in or start your wireless modem.
This is the full meal deal of scans. If nothing is detected at this point, then you can be confident that all is well. If the symptoms persist you can be very sure that they are not threat related.
Let me know what happens.
Thanks,