winXP audio driver + win2k Restriction message

Hi

1: I have a winXP PC which i am getting a weird error on. It has onboard sound and the drivers are installed, but everytime the computer restarts winXP wants to install the drivers again.. so first it deinstalls the exisiting drivers then installs them again at the end asking for a reboot.. which if i kept doing would go into an infinite loop!! any ideas on how i can get past this problem!?

2: on my win2k PC in IE6 when i click on tools - options i cant get any further i get the error message There are restrictions in effect on this computer. Please contact ur administrator.. I am logged in with an administrator account so im not sure how this can happen!? since i havnt changed the security policy how could this have happened?!

Thanks for any help
Regards
wc