Symantec urges caution before SP3 upgrade
Microsoft has denied that consumer security software, including Norton Internet Security and Norton 360, is to blame for wreaking havoc on some users' PCs after they upgraded to Windows XP Service Pack 3 (SP3).

Microsoft declined to answer questions about the problem, which has emptied Windows' Device Manager and deleted network connections, preventing some users from connecting to the internet or to wireless networks.

According to reports posted the day after Microsoft launched Windows XP SP3 on Windows Update, some users found that their network cards and previously-crafted connections had mysteriously vanished from Windows after updating to the service pack.