Perhaps the riched32.dll file has been corrupted. Boot to the Recovery
Console and extract the file from the WINXP install CD by keying in this
command:
expand <CDROM drive letter>:\i386\riched32.dl_ C:\Windows\System32
<ENTER>
For example, if you CDROM is drive E, the command would look like this:
expand E:\i386\riched32.dl_ C:\Windows\System32
<ENTER>