Acer Aspire One Netbook D260A.Windows XP not booting. Message Reads Windows could not start because the following file is missing or corrupt. Windows Root System 32 Hal dll No recovery disc or USB recovery available. Step by step how to Fix? Help appreciated. Thanks

Sometimes you can get the needed .dll file online, and manually place it on that drive, of course in the correct directory.To do this, you need a functioning computer and you hook up the hard drive with the problem VIA USB. You can get USB Hard drive adapters from most retailers.

You may want to extract all data before you do anything, just in case. Have you been doing backups????

Usually, you reinstall the OS to resolve this issue, but without disks, not so easy to do.

This happened to me I went into the bios and changed in the main section the sata mode from AHCI mode to IDE mode and it read the hard drive fine with no missing dll's.

A DLL, or dynamic link library, is an executable file that serves as a shared library for a number of functions. DLLs are developed in the same format as .exe files, and similarly, contain data, codes and other system resources. They were developed as a way to minimize the disk and memory space needed by application by storing it in your PC's hard drive instead. In effect, one single DLL can be accessed by multiple applications simultaneously.

DLL files can be corrupted or deleted accidentally. In this event, programs that required that particular DLL to complete particular operations no longer function properly. This is likely the case if you receive a pop-up that reads: "Could not find ***.dll." Luckily, you can easily download DLL files and restore them with little difficulty.