Razões para o computador desacelerar gradualmente
1) Unwanted Registry due to 3rd party softwares
2) Many programs that you install also install background applications. Due to bad coding when you uninstall the program the background task can still be left running. Many times a background task is shared and the uninstaller can't tell if it should be deleted or not.
3) Windows boot time slows down because some software that you install (or that self-installs) runs on start-up by default.
4) Data getting fragmented as keep adding new software. Badly Fragmented disk slows computer causes slow down
5) Uninstalling an application either via the control panel or the application’s start menu folder has been known to leave behind remnants of the uninstalled program. These remnants can slow down your computer while Windows tries to figure out what to do with them. Additionally, residue of old program stays behind in your system registry, clogging up your PC’s core.
Leia isto por mais motivos, Recurso retirado de aqui .