Many useful GUI search tools on Windows. Just as fast as opening a command prompt and trying to remember what to type, then trying to decipher the output
'
Everything' just lists, well, everything and you just filter out what you're looking for.
A rather different tool, which I tend to use most because it's the easiest, simplest and always there, is
Listary. I don't actually have this installed for searching - that's just one of the useful facilities it provides. It's primary use (for me) is to deal with the standard open/save dialogs defaulting to some appdata folder I never use. Hard to explain the benefit until you've used it for a while, and then you'll be lost without it.
If it's searching for data inside files (that is, where is the file that contains 'something') then there are many grep-alikes. The one I use is
AJCGrep mostly because I also use their AJC Active Backup (a lifesaver - not often, but it only needs to do it once). However, it is good in that it will give a list of matches with surrounding lines for context (try
that on a command line) and similar usefulness. Fast, too.