I would first create a new limited user profile, (account), and test. If that loads without problems then you are good to go for the next step. If you get the same problems with a new profile, then the problem is deeper.
Assuming a new profile works, you can then copy the data from the old corrupted profile to the new one, described here;
Then do the same for the other corrupted profiles.
My admin user will logon and boot normally. All limited users logons and boots will keep loading svchost.exe & iexplore.exe into hundreds of occurences. No applications load at all. No desktop full of icons. Must hard reset each time.
XP SP3 and IE 7.0.5730.11
I have checked for viruses. There are none.
This is maddening. My kids are going to kill me. Any ideas?