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Overheating processor
Modern processors generate more heat and when the temperature rises above the level specified via the BIOS, it can be why your PC is slow. Cleaning your PC fan can help. You should also check the fan motor to see if any bearings are loose. Setting the BIOS temperature level to a slightly higher figure than the current one can help when your PC is slow.
Malfunctioning RAM
If the installed RAM is not compatible with your PC or is slower than the optimal level specified in the machine, that can be a reason why your PC is slow. A slow PC is also a sign of defective RAM chips, so you should just check if they are from a reliable manufacturer. An extra fan will help your RAM cool down.
Failing hard disk
Slow access times, irregular boot failures and unexplained blue screens are definite signs of hard disk failure, which can be why your PC is slow. You should run the Error Check utility and then the Disk Defragmenter provided with Windows. The Error Check utility will prompt you to try to repair faulty sectors, while the defragmenter will skip the bad sectors and organize your files appropriately.
Incompatible BIOS settings
If your computer's BIOS settings are different to the recommended optimal machine configuration, it can be the leading cause why your PC is slow. Run an online search with your motherboard name to find out what the appropriate settings are, and change them accordingly.
Unsupported new drive
If you experience difficulty with accessing a drive you installed recently and your PC is slow, check the IDE interface type on your motherboard. The solution for an incompatible hard drive is a PCI add-on card .
Multiple activated Windows Services
The Windows system does not need most of the applications that start running at start-up. But, since they are automatically enabled, it can affect the performance of your system, in turn becoming a cause for why your PC is slow. Right-click on My Computer and click on Manage, Services and Applications. You can use the Disable button to stop any services you don't need.
Full hard disk
Whenever you add, modify or delete files in a computer, the hard disk stores the file contents in an unorganized manner. If your PC is slow, then you will need to defragment the hard disk to achieve optimal performance. Defragmenting will organize all the scattered bits and pieces of memory according to relevancy, which means, the data belonging to one file will be located next to each other, rather than all over the disk.
A cluttered registry could also be the reason why your PC is slow. To avoid problems with the Windows Registry, use a registry tool, such as RegCure, to scan, repair and optimize your PC for long-term peak performance.
• Start with the hardware itself. Your computer may be running slow due to unnecessary files that are saved and occupy large amount of disk space. In fixing a slow computer due to unnecessary files, follow these easy steps:
1. Click Start. Go to all programs. Go to Accessories. From Accessories, Click System Tools. From System Tools, click Disk Cleanup. Tick all the boxes that appear, and then confirm the operation by hitting yes. This shall take out all the unnecessary files in your computer.
Start>All programs>Accessories>System Tools>Disk Cleanup
• Defragmenting your hard drive will also result to a faster computer experience, and will prevent computer crash. Here is how to defragment your hard drive:
2. Click Start. Go to all programs. Go to Accessories. From Accessories, Click System Tools. From System Tools, click Disk Defragmenter. Once you have enabled the disk defragmenter, it shall analyze your hard drive and perform the necessary operation.
Start>All programs>Accessories>System Tools>Disk Defragmenter
• After your cleaning your hard drive, go to your anti-virus program to make sure that your computer is not infected. Slow connectivity is a symptom of virus infection. Fixing a slow computer will require that you have an updated and latest virus definitions or program installed in your system.
• Spyware programs have also the ability to slow your computer. An updated spyware program is necessary in fixing a slow computer. It is prudent that you have an anti-spyware installed as spyware hide in the background so it's quite difficult to determine if your computer is infected. There are several spyware programs that you can download from the internet.
• In fixing a slow computer, it is too frequent that the main culprit is a corrupt registry or registry errors. The registry is the heart and brain of your computer. Whatever you do, like when you open a file or starts any program application, your computer has to communicate to the registry to pull them up. You will have to repair your registry errors to bring back the speed of your computer. There are several registry repair or fix programs that you can find and download from the internet. Most are easy to use with friendly interfaces. Find one that will work best for your needs.
If the above doesn't resolve your concerns in fixing a slow computer, then you may have to unload your computer with some program applications, or if this is not a viable option, you may want to upgrade the physical memory of your computer. But this should only be a last recourse, after the tips mentioned above.
90-95% of computer issues are usually resolved just by cleaning and tuning up you're the hard drive of your computer as well as fixing and optimizing the registry. It's a good thing that the internet will make it easier for you to find good software program for this purpose.