NTOSKRNL.EXE corrupt or Missing files.. Dell Mini no CD ROM

Hi I have a Dell Inspiron Mini 10 that does not have CDROM
Here is a link for the comp....dell.com/content/products/productdetails.aspx/laptop-inspiron-10?c=ca&l=en&s=bsd&cs=cabsdt1


I am receiving an error code

Windows could not start because the following file is missing or corrupt
<windows root>\system32]NTOSKRNL.EXE.
Please re-install a copy of the above file.

How can I just Remove the entire thing and put on a copy of Vista?
 
There is a way to install an OS using a USB Flash drive 4GB or larger. You can also try using an external USB CD/DVD Drive
 
It is XP.. and no it is not under warranty.. I am unable to purchase these items listed above as I am very limited on cash. I have no USB flash drives either
 
then I went into Setup and changed the boot up from Hard Drive to the removable one and now it says that no operating system is found
 
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