itunes not reading id3 tags

For some reason, many of my songs that I imported using previous versions of itunes *specifically version 10.5* no longer are reading the ID3 tags correctly and now come up as unknown artists, unknown albums. Is there anyway to fix this without doing each song individually as they show up correctly in Windows Media Player. There were no issues on the original computer, however I transferred everything to my new computer and formatted the original one.