It looks like you may have a hard drive going bad in your Toshiba computer. This "SQ004660V08 (C:)" is what gave it away.
I'm guessing you probably have a toshiba hard drive just as mine did. Unfortunately from what I have been able to find, Toshiba does not make a drive testing utility.
You can try the Seagate Seatools for DOS
diagnostics and run a generic diagnostic test on it.
I must forewarn you that any testing whether it says it is destructive or non-destructive does have the possibility of making things worse if the drive is failing. A failing drive will be put through its paces at a very high rate which will stress it beyond normal use. Thus making the possibility of failure much greater.
Hope this helps,