On a compaq Presario, when you try to boots, get the message,
Invalid system disk, remore and hit any button.

I put the hard drive in another computer as a slave,
can not find windows at all.

It has DIR00001 thru DIR00024, BOOTLOG.PRV
BOOTLOG.TXT,
then, FILE0001.CHK THRU FILE0745.CHK
the ones named files are Recovered File Fragments, I guess.

Any ideas on how to restore to operation?