Make a .bat file in your trezarcoin folder

trezarcoin-qt.exe --reindex


It takes 10 minutes or less.

If you don't know how to make a bat file, just go in to your trezarcoin folder, right click > new > text document
Then enter trezarcoin-qt.exe --reindex
Then 'save as' Reindex.bat  Make sure that save as file type is "all files" not "text documents (*.txt)"