When using Defraggler on a Vista 64 machine, the power went out and interrupted the defrag. Will I most likely have one or more corrupt files that can't be accessed correctly? Aside from getting a UPS, any advice on what to do at this point? My important data is all backed up, but I don't want to restore it all if it's not needed.

Thanks!

Defraggler works through the Windows defrag API therefore your files may be alright, however it's still recommended to run a disk error check.

For more information on this read the Piriform Docs on this page.