Windows Vista Service Pack 2 went final earlier this week, with numerous fixes and tweaks to improve performance, bolster security, and squash bugs. But some PC World readers are seeing another welcome change to SP2: a lot more free disk space.

In comments posted in our forums, several readers reported large increases in free hard disk space after installing Vista SP2. Mind you, I'm not talking about a gigabyte here or there; one reader claimed that installing Vista SP2 freed up a massive 40 GB chunk of disk space. Another reader said, "Wow! I didn't notice that til now. I went from about 88GB free to 122GB free. That's a significant change 'under the hood,' isn't it?" And yet another reader gained back 130 GB of hard disk space. Wow.

More: http://www.pcworld.com/article/165799/