If your computer has been running slow and you are having problems running software, then you may have registry problems.
A computer does not get slow over time, instead, it should maintain its efficiency and run just like you started it.
If you have cleared your recycled bin and have not installed programs that are taking up too much room you more than likely have a problem with the registry.
In today's day and age, it is important to make sure that your computer is up to par, as when surfing the internet you can run into all types of problems such as malware and viruses, however, if your computer has gotten slow over time then all you need to do is do is a simple scan of your computer to see if you have errors on your system.
At many websites the scan is free and it will tell you if you do have registry problems.
Again, it is important to note that computers do not get slower over time and if you have a virus it is more of a day and night experience.
Meaning, at one moment your computer is running good and the next moment it isn't.
But if your computer has been slowly slowing to a crawl, just have it scanned to make sure that you don't have any real issues with internal software.
The registry will control every process on your computer from everything to your desktop wall paper to online games.
Just a simple scan can tell you everything you need to know.