Skip to content
Zepe

Performance and storage

Most Windows performance advice is superstition dressed as maintenance. Registry cleaners, aggressive service disabling and the habit of clearing caches weekly do very little and occasionally do harm. The guides here stick to the small number of actions that reclaim real space or genuinely unstick a machine.

Storage is the honest win. Windows.old alone can hold twenty gigabytes or more, Disk Cleanup's system-files mode reaches things the ordinary mode does not, and a greyed-out Extend Volume button has a specific, fixable cause rather than a mysterious one.

On the process side, the emphasis is on doing the least destructive thing that works, and on recognising the cases where a process will not close no matter which tool you use.

What you'll learn

  • The escalation order for an unresponsive application, from Alt+F4 through to taskkill
  • Which temporary files are safe to delete, which are not, and the deadline on removing Windows.old
  • Why Extend Volume is greyed out and what has to be true before it is available
  • How to remove Python, Node.js, Java and Eclipse including the leftovers their uninstallers ignore
  • How to tell a genuinely hung process from one that is simply waiting on something slow

4 guides in performance and storage

  • How to Force Quit an App on Windows

    Close a frozen program on Windows using Alt + F4, Task Manager or taskkill — in escalation order, plus what to do when a process refuses to end at all.

    Performance and storageUpdated

  • How to Delete Temp Files and Windows.old Safely

    Free space in Windows with Disk Cleanup, Storage Sense and the %temp% folder, which files are safe to delete, and the real deadline on removing Windows.old.

    Performance and storageUpdated

  • How to Extend Your C Drive in Windows 10

    Extend the C partition using Disk Management, and understand exactly why Extend Volume is greyed out — adjacency, unallocated space and the recovery partition.

    Performance and storageUpdated

  • How to Uninstall Python, Node and Java on Windows

    Remove Python, Node.js, Java and Eclipse from Windows completely, including the PATH entries, caches and config folders their uninstallers leave behind.

    Performance and storageUpdated

Questions about performance and storage

Is it safe to delete the Windows.old folder?

Yes, once you are confident you do not want to roll back. Windows.old holds your previous installation and exists so the upgrade can be reversed. Windows deletes it automatically after ten days, and removing it early through Disk Cleanup is safe — it only forfeits the rollback option.

Why is Extend Volume greyed out for my C drive?

Because Disk Management can only extend a volume into unallocated space that is immediately to its right on the same physical disk. Free space elsewhere, space on another disk, or a recovery partition sitting between C and the free space will all leave the option unavailable.

Does ending a process in Task Manager lose my work?

Yes, in almost all cases. Ending a task terminates the process without letting it save or run its shutdown code. Try the application's own close command and Alt+F4 first; those ask the program to exit and give it a chance to prompt you.

Related topics

See all 8 topics →