Windows XP Pro SP2 fully updated
Norton Internet Security 2006 fully updated
About 1 in every 4-5 times that I boot, immediately after logon, when user software is loading, I get a blue screen that says that my computer has been shut down to prevent etc.... and the listed driver is npdriver.sys. This is the Norton Protection Center driver. The Web has several postings about this and other errors associated with NPDRIVER.SYS. Several postings say that the driver is sometimes infected, especially in /SYSTEM32 locations. Symantec's Online Chat suggestion is to uninstall and then reinstall Norton Internet Security 2006, because the file may be corrupted. I can do this, but I'm not certain it would solve the problem. Plus I've spent a substantial amont of time fixing "corrupted" Symantec files this way. And I'm not certain that I would not be letting a virus or trojan remain active on my machine. I've done a NIS full system scan, a Symantec online scan, a Windows Live OneCare scan, a Security Task Manager scan, and a BlackLight beta rootkit scanner. Nothing turns up. Just uninstall and reinstall, or is there a better solution?