Can't edit MP3 tags like artist or title
Solution 1:
There's two options I'd look at seriously. Firstly, if you're convinced there's major issues with the tag, mp3diags might do a good job fixing it. Naturally read the big red and yellow print, and keep backups before using a program that makes substantial changes to your files.
The other would be to use a dedicated tag editor - I use mp3tag a lot to do your tag editing, assuming its just windows being silly. I'd use this anyway to manage files since its a lot simpler than using explorer for large numbers of files.
Solution 2:
I had the same issue, not being able to edit my MP3 detail.
I used MP3tag to resolve the issue (if you don't have it, then use this link MP3tag Free Download to download and install - its free and bug free)
1 - Open the MP3 with MP3tag 2 - Right clicked on the MP3 (a pop-up menu will appear) 3 - Select "Remove Tag" to remove the tag 4 - Save
Now you can edit your MP3 with no problem.