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There could be many reasons such as
1. Low RAM
2. Slow Processor.
3. Hard Drive is full
4. Unnecessary softwares running in the background
5. Bad Sectors in Hard Drive
6. Virus / Worm / Malware / Trojan
7. Two antivirus intalled at the same time, etc.
1) Too many programs are running at the same time.It is common for users to download utilities, applications, and other programs that run in the background. The more programs that are running – whether you see them or not – the less “attention span” your computer has to do other things you are asking it to do.
Avoid downloading web browser-helpers, more than one anti-malware program, or applications that claim to “speed up” your internet or your computer, as each one added will slow down your performance. (It’s also a good idea to uninstall programs that you do not use to increase your machine’s processing speed.)
2) There’s not enough free RAM.Random-access memory (RAM) is what your computer uses for temporary working and thinking space. The more programs running at time, the more RAM is used. If your computer is running slowly, it could be because too many programs are running, and not enough RAM. To make your computer run faster, run fewer programs at a time or upgrade your RAM.
3) You have a virus/malware infection.Internet slowdowns and slow computer operation can be a symptom of an infection. To find out if you have a malware problem, use an anti-virus and anti-spyware application to find it — like the free scanning tool we have available in the Self-Help area of our website.
4) You have low hard drive space.Lack of hard drive space often affects older computers, or computers that do a lot of video editing or design work. Hard drives, which store all of your computer’s information, have a finite amount of space. Once they’re filled up, the computer no longer has the ability to manipulate files. The computer will slow down, eventually becoming unusable.
Generally, Windows will alert you to “low disk space” if this is the case. Moving some of your less-used files — such as pictures, music, and movies — to an external hard drive would free up some of your computer’s hard drive space and make it run faster. Deleting temporary files and performing a disk cleanup are also good ways to reclaim wasted space. Another solution? Install a bigger hard drive.
5) Restart your computer.Every once in a while, it is a good idea to restart your computer. A computer cannot complete some of its updates until you restart. Restarting your computer can also free up memory resources tied up by buggy programs.
6) Sharing a wireless network.If your internet is running slowly, but your computer is running quickly, you could have a lot of activity on your wireless network. Check to see if anyone else on your network is doing something that uses a lot of bandwidth (like streaming video or playing online games), as this can make your computer run slowly. You should also make sure your wireless network is secure so someone else isn’t using your Internet bandwidth. If your wireless network is not secure, Geek Squad recommends you create a password to secure your data and ensure strangers don’t join your network.
7) Too many “bells and whistles.”Animated pointers and hi-resolution images of your favorite vacation spot may look nice, but they can also slow your computer down. Since animations and images load into memory every time you start your PC , there is less processing power available for more important tasks.
8) You have a scanning program running.When a scanning program such as an anti-virus, anti-spyware, or automatic backup is running, your computer may respond slowly. We don’t recommend disabling these, as they are an important part of your computers safety. These programs should be run at least once a week, but don’t plan on using your machine while they are running.
9) Your computer barely meets your software’s minimum requirements.Software usually has a list of requirements for things like processor speed, operating system, memory (RAM) and hard drive space. These specifications are the absolute minimum levels needed to make the software run. If your computer just meets the requirements, the software will run, but it might not run well. Try to meet or surpass the system “recommendations” of your software, rather than just meeting the bare “requirements.”
10) You have a fragmented hard drive.It’s important to defragment your hard drive to help the computer organize itself better and make sure it runs smoothly. Think of your hard drive as someone who really likes to be organized but is always in a big hurry. Because you hard drive is low on time, it might save bits of a file here and pieces of it there, rather than all together. This works fine for a while, but eventually everything is scattered, and it takes your hard drive longer to find everything and get moving. Defragmenting is like a really big clean up. Your hard drive will put everything back in the right place and, as a result, will be able to move more quickly.
Many reasons could affect computer speed:
1- CPU temperature: temperature is an important factor of computer's speed, and if it raised above certain temperature it causes problems and affect on the processor's speed.
2- H.D.D Size and Free Space: the H.D.D should have free space according to the R.A.M and the computer should has a proper size of R.A.M according to it's H.D.D size to afford the processes, also it depends on the H.D.D and it's speed.
3- Components Clean: another problem that could harm the PC and its speed is the clean of the components, that's because the dust would affect the fan speed and that would increase the temperature of the CPU or cause damages to the M.B components or the H.D.D sectors.
4- H.D.D Bad Sectors: bad sectors of H.D.D is an unreadable or damaged sectors of H.D.D and it affects H.D.D speed.
5- Incompatible Software or OS: common problems that face everyone are the OS and Software and their requirements, if the PC have the minimum requirements or below that would make the PC slow down similarly to the OS; The PC should has the recommended requirements or higher to keep the performance high.
Lack of antivirus; Outdated software; Old hardware components
1. Too many programs are running at the same time.
2. There’s not enough free RAM: Random-access memory (RAM) is what your computer uses for temporary working and thinking space. The more programs running at time, the more RAM is used. If your computer is running slowly, it could be because too many programs are running, and not enough RAM. To make your computer run faster, run fewer programs at a time or upgrade your RAM.
3. You have low hard drive space: Lack of hard drive space often affects older computers, or computers that do a lot of video editing or design work. Hard drives, which store all of your computer’s information, have a finite amount of space. Once they’re filled up, the computer no longer has the ability to manipulate files. The computer will slow down, eventually becoming unusable.
4. Lack of Restart your computer: A computer cannot complete some of its updates until you restart. Restarting your computer can also free up memory resources tied up by buggy programs.
5. Animated pointers and hi-resolution images of your favorite vacation spot may look nice, but they can also slow your computer down.
6. when a scanning program such as an anti-virus, anti-spyware, or automatic backup is running, your computer may respond slowly.
7. You have a virus/malware infection.
the slowdown can be hardware or software
-hardware...old hardware,not enuf memory, old Hdd or Hdd whit bad's, over hit of the Cpu or VGA
-software... no drivers, programs that not installed correctly, malware, virus, no windows updates
Virus.malwares and storage full of the hard and bad sectors of hard disk are the most common issues for slow down the computer.
1. Computer Specification
2. Hardware Failure
3. Unwanted System and Service Processing
1)Too many unwanted applications installed in pc which start in windows startup.
2)Too many tasks running at the same time
3)Overheating due to intensive graphic applications or dust in vents
TOO MUCH DATA STORAGE OR THERES MUST BE VIRUSES
