Blue screen then boots into Windows.

[Guest 7777]

Hello, have a Windows 2003 Server machine that crashed yesterday with a blue

screen in which I tried to reboot a few times afterwards but got a DOS

message saying something like hard drive not found (I know I should've wrote

down the error messages). I remember hearing of putting the hard drive in

the freezer in which maybe I'll let it stay turned off and try again in the

morning in trying to cool it off in which it appears to have booted into

Windows successfully currently so am wondering are there some steps like

running disk defrag or some other windows system tools to perhaps fix any

corrupted areas on the hard drive/o.s. while I have windows up and running

before it crashes again? Thanks in advance.