Visual Studio 2008 – install error! Please help!

I want to install VS2008 but when I start it shows error: “An unknown error occured while copying files to your temporary folder! Setup will exit now!”
Same DVD works at another PC! I found at google a lot of topics about this error but any advice didn’t help!
Answer #1
I tried this advices, but they didn’t help!
http://social.msdn.microsoft.com/forums/en-US/vssetup/thread/dfff4491-422a-48d9-9db6-c6724349f391