This utility offers a one-stop-shop for cleaning and maintaining your computer for better overall system performance. The interface is very simple, featuring only a few buttons, which makes it easy to get down to cleaning immediately (in fact, it automatically runs on start-up) and doesn't confuse you with multiple steps.

Although it lacks a few of the bells and whistles found in other PC-cleaning applications, this free program offers more than enough features to make it a worthy download.

Spybot - Search & Destroy has been in the anti spyware game for a long time offering features we've come to expect in the best apps in the category, but bugs and false positives make it difficult to recommend.

Along with quick analysis and scans, SmartDefrag boasts an automated defragger that continually defrags the files that you use the most, and does it without becoming a persistent drag on your system resources.

Wise Registry Cleaner is one of the safest Registry cleaning tools available in the market today. Its scanning engine is thorough, safe and fast. It is so easy to use, even the least experienced user can easily repair registry with this tool. It scans the Windows registry and finds incorrect or obsolete information in the registry. By fixing these obsolete information in Windows registry, your system will can work better and more quickly.

Wise Disk Cleaner is a free disk utility designed to help you keep your disk clean by deleting any unnecessary files. Usually, these unnecessary, or junk files appear as a result of program's incomplete uninstalls, or Temporary Internet Files. It is best if these files are wiped out from time to time, since they may, at some point, use a considerable amount of space on your drives.