Knowing only the tiny bit of information you provided, it's impossible to tell you anything for sure.
The first thing I'd suggest is looking at that other PC and see if, by chance, there was a backup taken to that PC when whatever happened was done. If so, you might be able to use that as a source of restore.
Otherwise, if the files are truly gone from your device, then restore depends on having a data source, and that won't be your device itself...rather, you would need to use a prior backup that you have taken as the source of restore now. You can find full instructions via the link in my auto-sig on this post.
Occam's Razor nearly always applies when troubleshooting technology issues!
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