Avast Software Updater Account in windows 7

Hi, I´m asking for some help

Today when I turn on my laptop, I new account appers “AvastsoftewareUpdater”.This account have been setting like admimistrator account the wear thinks is my account is the only one in my laptop. I was trying to fix this and I find my way to start using my account but the problem is I can´t Unistall Avast or reboot my system becouse the AVAST account is the administrator account, I try to change the type of the avast account but is kind of block, also if y try to swich my account to be the administrator again but this not happend.

If turn on again my laptop and the same problem happend avast accout appers everytime. I support all my information but is imposible to rebbot the system becouse “I´M NOT THE ADMINISTATOR OF MY OWN COMPUTER”. So I´m asking for some help.

Thanks a lot

Have your computer administrator do this http://forum.avast.com/index.php?topic=132063.msg974311#msg974311