I have an IBM ThinkPad that was once a part of a student network at a university. I own the laptop and took it with me after graduation. It has Windows XP Pro. I wanted to update the anti-virus software to Norton 2009. SInce I had an older version of Norton on the HD, I had to delete the older version. Not so easy, it was password protected. I went into the Registry and found the older Norton and set the bit to 0 so that I could delete it w/o the password. So far so good. I installed the 2009 Norton antivirus and not I can't turn the laptop off. I get to the "Windows is shutting down..." message and get the following error: "The instruction as 0x004497c0 referrenced memory at 0x00001608. The memory could not be written."
Any ideas what's going on?