Open Resource Monitor and the big blue Standby block looks like memory being wasted. It is the opposite - it is Windows doing its job well. Here is what standby memory really is, and why emptying it is usually a downgrade.
Every RAM cleaner advert in the world points at the same picture: a memory graph that is nearly full. The biggest single slice of that "full" memory on a healthy PC is standby. Before you let any tool delete it, understand what Windows parked there and why - because standby memory is a performance feature, not a leak.
Standby pages are copies of things you already used: files you opened, DLLs your programs loaded, and the remains of apps you just closed. Windows keeps them in RAM after the original need passes, on one bet - you might want them again soon. If you do, reopening is nearly instant. Nothing is "stuck"; every standby page carries a priority (0 to 7) so Windows knows which copies are the most disposable.
Task Manager already does this maths for you. Available = Free + Standby. When an app asks for memory, Windows hands over free pages first and standby pages immediately after - reclaiming standby takes no disk work at all. So a PC showing "only 400 MB free" with 6 GB on standby is not full in any way that can slow it down. It has 6.4 GB ready. Judge your PC by Available and by how it feels, never by the Free number alone.
RAM is thousands of times faster than even an SSD. The second launch of Chrome, a game level you already loaded, a document you closed by mistake - all of these come back from standby instead of the disk. Delete the cache and the next launch pays full disk price again. This is why a freshly "cleaned" PC can feel oddly sluggish for the first minutes: you threw away the fast copies and kept the slow originals.
There is a real footnote. On some older Windows 10 builds, certain games were reported to stutter when the standby list grew huge and the game demanded large fresh allocations at the same moment. That is a specific, testable situation - not a general truth. If your game stutters, test it: note the stutter, clear only the standby list once, play the same scene. If nothing changes on your machine, standby was innocent and the cause is elsewhere (drivers, thermals, a paging file under pressure). Do not adopt a permanent cleaning habit for a problem you have not confirmed.
If you want the ground truth, Microsoft's own free RAMMap (from Sysinternals) shows every list by name - standby by priority, modified, working sets per process. Ten seconds in RAMMap teaches more about your memory than a month of watching a percentage in a cleaner. Download it only from Microsoft's Sysinternals pages.
The complete knowledge and full walkthrough are in the video - the tool on a real PC, every option shown live.
Watch Full VideoNormally no - Windows reclaims standby pages instantly when a game asks for memory. A small number of older Windows 10 builds had reported stutter cases. Test once on your own machine before believing it applies to you.
No. Zero standby means zero cache, so every reopened app and file is read from disk again at full price. A healthy PC naturally rebuilds standby within minutes of use - fighting it is fighting Windows itself.
Because Windows deliberately converts free pages into useful cache instead of leaving them idle. Free RAM does nothing for you; standby RAM is free RAM that is also doing a job. Watch Available instead.