As most of us know, over time our PC just gets slower. This is due to temp files, old registry entries, a full hard drive, and a host of other "features" of a Microsoft OS. Fortunately, PC World just released an article on Cheap and Free Tools to Put Zip Back in Your PC . The PC World article covers four subject areas: Speed Freaks Optimize for Speed Internet Boosters Application Boosters For Speed Freaks, the one fully free tool is Cleanup Assistant . Cleanup Assistant will scour your hard drive and remove unnecessary files for you, e.g. duplicates and caches. In the Optimize for Speed category, there are four free tools mentioned. Three of them look to optimize your Registry: Eusing Free Registry Cleaner , CCleaner , and Auslogics Registry Defrag . In addition, CCleaner will also look at removing unnecessary files, similar to Cleanup Assistant. The final free tool in the Optimize for Speed category is Advanced Windows Care 2 Personal, which its primary utility is to clean u...