NIS update this week has caused problems

When I powered up on Wednesday afternoon:

 

XP desktop: (1)  the Norton Toolbar had disappeared so there was no Vault, (2) an advert kept popping up asking if I wanted to start the Vault for Firefox (I was on IE8 at the time) and (3) there was an error message about intiupdater.exe.

I restarted the PC twice and I got everything back.

 

Win7 laptop: (1) I had to enter my email address to open the vault and I tried three times to get it to accept my password - which I was entering carefully. I got fed up and didn't use my laptop until just now. Same problem/restarted and now working OK.

 

Did anyone else have any problems? What's intiupdater.exe?

 

PS There must have been an update because on my XP desktop, when I try to log into my mail via IE8, it now says "Multiple log-ins for this site: 3 >" and I have to click on the '>' to see them and choose one. Before, it said "Multiple log-ins" and showed them.

PPS It's still showing all three on my Win7 laptop - no number 3!