A very good company with some excellent tech experts and some great programs is, http://www.piriform.com/ Ccleaner is an excellent program that will safely remove a lot of the built up rubbish that seems to collect and slow down your PC. I have used it for many years and have never had a problem with it. Defraggler is another excellent tool. It supports both FAT2 and NTFS. A good tool for doing a defrag of your HDD. Rescuva An easy to use data recovery tool. Speccy Is an advanced system information tool All the above are free but there are paid versions available if you like. All our products are designed for Microsoft Windows and will run on all versions including: Windows 7, Vista and XP - both 32-bit and 64-bit editions. There is also a Ccleaner version for mac.