@Stenis is using a hardware calibrated monitor and when changing the monitor profile within Windows Color System (WCS) instead from the monitor hardware (or with the dedicated profile loader) most probably leads to trouble …
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The current monitor profile, which is shown in WCS, is ‘read’ by all color managed apps.
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Changing the profile at the monitor side – let’s say from AdobeRGB to sRGB – sets the monitor to those new values (= stored in the monitor) and forwards the change of the ICC profile to the WCS, so that the apps then get to know, “the monitor is in sRGB mode” – in some cases on the fly, otherwise after restarting the app.
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The other way round doesn’t work. Simply changing the ICC profile in WCS does not trigger the hardware calibrated monitor. As a result the WCS communicates e.g. “sRGB” as system profile, but the monitor is still on “AdobeRGB” … then showing “wrong” colors – and easily to avoid.