I keep getting message once I attempt to download Microsoft Net Framework 2.0. It reads..."Error 25015. Failed to install assembly 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\AspNetMMCExt.dll' because of system error: The file or directory is corrupted or unreadable.

I click "retry" but same error pops up. Can you please help me?

I have a Dell Dimension E510 Microsoft Windows XP Media Center Edition