Hello Dstillman,
Thank you for using Microsoft Windows Vista Forums.
How long have you been receiving these error messages? Have you made any changes to your operating system prior to thses errors? Any new software/hardware installed or any new Windows Updates?
It sounds that a dll is missing. you can repair it easily if you have a vista's bootable disc. Just boot from the disc and then click on repair your computer and then click on start up repair option and it will do the rest.
or, if the problem is not solved then insert the vista dvd and then open the command prompt as administrator and then execute the following command..
C:sfc scannow
and then hit enter.
Please let us know status. Thanks!