A tool like Paragon Partition Manager should allow you to re-align the drive without having to re-install Windows. I haven't tried it myself since Acronis kept the alignment to my new drive, but I've seen it recommended.
Problem is that now it costs something like $25 - was free for a short time earlier in the year. You can use Gparted to change alignment but it has the possibility of messing up Windows boot (although that can be repaired). You should be able to google partition alignment and find some options.