If it's a partition on the SAME physical drive, it doesn't surprise me that you get the same error. If it's the same physical drive, all you are doing is changing the pointer value.

Run some error checking diagnostics on the physical drive and see what you get.

>I tried copying to a different drive letter (different partition, I guess), but get the same problem.
>
>>However, the fact that you can copy everything to a new computer and it compiles just fine makes me lean towards the idea that you might have a sector trying to go bad and one of your files is sitting on it. Especially when you try to create a new project with the same files. To test this, my suggest would be to copy off the files, delete them completely and run some diagnostics on your drive. I would suggest a de-frag, but that would probably only put another file on the 'bad' spot and move your problem around.