"'' is not a valid login or you do not have permission" on sql server installation

I have tried installing SQL Server 2008 multiple times on my machine, and I always receive this error about 3/4 of the way through: '' is not a valid login or you do not have permission.

I use SYSTEM user for install, when i try to use my admin login/password installation manager shows other errors.

From serverfault $pageUsers[$entry.posts[0].author].name

• Did you run as an administrator the installator ?

  From Cédric Boivin

• I solved my problem, it occurs when you computer name equals your username.

  From $pageUsers[$post.author].name

• Thanks Alex!

  It saved my day!

  Strange bug / behavior though...

  From Tanmay Soni

• I face the same problem.and thank you for helping me to slove the problem.

  From Richard

• WOW, It really worked! Thank you Alex :)

  From Vahid