umm I don't think safebrowser has anything to do with it...the update helper seems to be trying to install an account that already exists...repeatedly. for a very long time, looks like. ??!?!?!?!
what this seems to have done on my desktop is that the registry became corrupted!!! and I was unable to logon as me.....
ouch. aka OMG!
FORTUNATELY I had a spare logon and was able to
backup the registry,
rename the S-1-5####.######<null> and .bak files appropriately,
reset RefCount and State to 0 (zero),
reboot and VIOLA! log on.
moral: have more than one Admin logon, print off the how-to for fixing User Profile problems easily.
note: be CAREFULE when using REGEDIT. ALWAYS ALWAYS ALWAYS do a BACKUP beforehand.
creating a Restore Point afterwords is not a bad idea.....