In using of Windows most of the times system creates page files which will act like virtual memory. But those virtual files may not clear automatically when you shut down the PC or Laptop which slows the RAM speed eventually. You can automatically or forcefully remove or delete the virtual files when shutting down your computer.
To do this follow the below steps:
1. Go to Start then Control Panel
2. Select Administrative Tools
3. Select Local Security Policy
4. Select Security Settings
5. Select Local Policies
6. Select Security Options
7. Go to the right hand side "Shutdown : Clear Virtual Memory Page File" & click twice on this option & enable the option
8. Now click on OK button
Now virtual files will be automatically deleted in every shutdown & your RAM speed will be increase surely.
Sometimes also do the below practice:
1. Go to RUN
2. Now type Tree
3. Press Enter
Do the above job sometimes & hope it will also increase your RAM performance.