[SOLVED] Chkdsk

I ran chkdsk on an ACER netbook because I had used the big red button to stop an unwanted program.

I tried to run it on an ACER mini desktop ans was told I don't have the correct version for the system I am running.

Both machines are running Win 7 64.

How do I get the correct version, or how to do this?

Or do I need to?

TIA