Causes for a slow computer can very, depending on your operating system, but basically there is a check into. Spending a couple of hours doing maintenance on your computer can greatly improve its performance. Following these tips should help you get started.
You can start by cleaning up your computer. Start by going to my computer, and right clicking on your hard drive. Click the cleanup button and run it. If you have not run a defrag on your computer for a long time. Or maybe never. You will want to run a complete defrag. Since it's typically takes a long time start it before going to bed and let it run.
Next you want to make sure your computer does not have a virus on it. Update your anti virus program with the latest definitions and run a full scan. If you do not find anything that's great. After that you want to scan and delete any spyware from your computer. If you do not have a program to do this you will want to download a professional version. The price for a free one is great, but they do not do a complete job.
More than likely you will find many instances of spyware infections running on your computer. Spyware is a huge resource memory hog. If your hard drive is getting full remove any programs you no longer need. Depending on how old your computer is. You may need to upgrade the physical memory. If you do not have the skills to do this you want to take into a shop and have it done for you. Memory is cheap these days and having increased memory in your PC will speed up all of your applications.
Next you will want to scan and repair any registry errors. Windows does not have any tools to do this that are built-in, so you will need a third-party program. A good Registry repair program is a wise investment for any computer. A poorly maintained or corrupt registry is the largest reason a complete computer will slow down. It will cause freezes, blue screens, slow boot times, and slow loading applications plus general errors.
Anytime you make changes to your computer, install or uninstall software, preform improper shutdowns, or if your computer has locked up and crashed, any of these will cause a corrupt registry. Keeping up with maintenance on your computer will ensure that it has a long life and continues to run smooth. It is amazing that most people never perform any maintenance on their computer until they have a problem. You should schedule regular weekly scans.
Source by Mike D Tucker