Don't use wincache on IIS 7+. I found that PHP on IIS runs faster without wincache, and when wincache is used it always causes php to seize up after a large number of requests and your server will stop responding. PHP 5.5 has a built in op-code cache extension, so it's probably not worth using wincache any more.
Microsoft's official release of Wincache 1.3 for PHP 5.4 and 5.5 is now available on the Wincache home page: http://www.iis.net/download/wincacheforphp
- Wincache official homepage from the fantastic IIS site, one of my favourites, well worth exploring.
- Microsoft's own pre-release builds for Wincache: http://sourceforge.net/projects/wincache/files/development/