Most Dell's (I don't know about the mini's) have a recovery partition on the hard drive accessed by (for Windows XP) CTRL/F11 at power on.  This will restore the PC to the original factory condition and no discs are needed.  This will erase all user data and installed programs.  Otherwise, looking at the various google "hits" on this it will take a Windows XP disc and at a minimum a Windows XP "Repair" install (it's like installing, you boot from the disc but you select Repair instead of Install).  You should be able to order the Windows disc from Dell  HERE  if you are in the US.  Other countries you must contact Dell for your area. The other options are to call Dell Support and if it's out of warranty pay for support or take the PC to a PC repair shop and have them fix it. 
Hello I am getting registry file code c0000218.  I have tried to boot in safe mode and last good configuration to no avail. I do not have a CD drive for this computer.  I am not sure how to reinstall the program.  I do have a USB drive but am unsure of where to get the files for it. I have searched the forum for answers this is my last attempt
registry file failure for a dell Inspiron Mini 10v (1011) no cd drive