I downloaded bitcoin-0.8.3-win32-setup.exe and installed onto my Windows 7 x64 Ultimate computer, ran it, and shortly after it started working, it popped this error dialog: "failed to read block".

I deleted the %appdata%\roaming\bitcoin folder, reran it to the same error.  I uninstalled it, repeated the same steps, resulting in the same error.

Then I tried the same with bitcoin-0.8.2-win32-setup.exe and it gave the same error even after repeating above.

It doesn't take long during its download of data before popping up this error.  Nothing I do seems to solve this.  I even tried running with Administrator privilege to no avail.

I would attach the debug.log if this forum would let me.