Ccleaner

CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure by cleaning key areas of the PC. It is easy to use and a small, fast download.

• It cleans temporary files, history, cookies, Autocomplete form history left by Internet Explorer,  Firefox, Google Chrome, Opera, Apple Safari and some other browsers.
• Cleans Recycle Bin, Recent Documents, Temporary files and Log files.
• Has advanced features to remove unused and old registry entries.
• It has lots of options allowing you to uninstall software, view and edit programs that run when you start the PC and much more.

Get the latest download from one of the mirrors at http://www.piriform.com/ccleaner/download (around 3Mb)

See some screenshots: http://www.piriform.com/ccleaner/screenshots

Disk Defrag is a vital maintenance tool that will improve your PC's performance by defragmenting and re-arranging files on your disk. This is like what you do when you have kids messing up a house by leaving stuff lying allover the floor and other wrong places. What you do is to set sometime aside to create order. This program does that.

I prefer using Disc Defrag to Windows onboard alternative as I find this faster. The first time you defragment, especially if you have lots of data or large partitions of many dozen or hundred gigabytes, it may take a long time but, if you defragment regularly, like every 2, 3 weeks, it should be much faster.

Download Disc Defrag from http://www.auslogics.com/en/software/disk-defrag/download/ (About 4.46 MB)

Once installed, start it and at least select partition/disc "C" (or wherever Windows is installed, normally C) and "Defrag".

See this article for much more including a video tutorial: http://www.orbituganda.com/how-speed-your-pc