Will the computer slow down if I install multiple operating systems


Many of my friends have said that installing multiple operating systems on a single PC slows down individual OS's because the total RAM gets divided among the OS's.

Is there any truth in the above statement?

Best Answer

It depends on how you install the multiple operating systems – there are generally two options

  • installing for dual boot
  • installing using a VM

Dual boot installation just places the other OS on free space on your hard disk, so it will use hard disk space (you may need/be-asked-to to create new partitions), but since in a dual boot only one OS will run at any given time, then no memory or CPU is being used by the other OS.

Virtual machine (VM) is a software program which emulates the hardware of a PC. If you use a VM to install your second OS, then both OS can run at the same time – so you can have a Windows PC which has Linux running in a VM-window, and you can use both at the same time. Since you can use both at the same time, they both will use memory and CPU, and then you may see the computer slowing down.

If you don't know anything about how to use a VM, then it is unlikely that you have one, but rather that you have a dual boot system, in which case – NO, you will not see the system slowing down.