I’ve been a fan of Cacheman from the very beginning. It’s an essential install for me on every copy of Microsoft Windows I own. Until recently, Windows Vista was unsupported – but they’ve just announced / released Cacheman 7 [download] today! It’s also forward-compatible with Windows 7:
Cacheman is an application designed to improve the performance of your computer by optimizing several caches, managing RAM and fine tuning a number of system settings. Auto-Optimization makes it suitable for novice and intermediate users yet it is also powerful and versatile enough for computer experts. Backups of settings ensure that all user modifications can be reversed with a single click. Cacheman runs on Windows XP/Vista/7.
Trust me – if you use Windows, you want this.