Win11_26100.3775 24H2 patch (KB5054979) breaks 4.4.1 caching Topic is solved

[NSodokin]

windows11 26100.3775 >>> KB5054979
Hardware Information

    CPU:
Ryzen9-7900

    Main Board:
Gigabyte Aorus 870E ProIce

    Memory:
2x48GB ECC Patriot Viper

    Hard Drives:
Samsung EVO 990 plus

PrimoCache Version:
4.4.1

Screenshot(s) of your PrimoCache's main dialog showing cache configuration and statistics:

Problem Description:

Before todays update i had 40-50% caching for all my drives. Primocache worked fine.

After update

2025-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5054979)


and

2025-04 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5055523)

Primocache´s caching is reduced by at least 75% on all drives.

The same behavior that happened with 4.3.0 installed on 24H2

So Microsoft must have changed something on the Cache Priority again.



EDIT 20mins Later : DEINSTALLED UPDATE >>
2025-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5054979)
Primocache 4.4.1 is working again with ~61% caching on all drives.

So KB5054979 is the cause of the disfunction of Primocache on my system.

[Support]

Thank you very much for your detailed feedback! We will check this soon.

[NSodokin]

it is weird that you get no other reports about this issue.

i just re-checked it and to be honest if this patch KB5054979 is affecting most Win 11_24H2 systems with Primocache on this planet,
you should not look into this soon but set high priority and check this asap....

i am in Trial 20+ days left , so i haven't bought your product yet..

i would appreciate it if you´d show more interest in looking at possible problems with your Product after reported...

[Rootax]

For the record, I'm not noticing the problem here.

[tverweij]

Did you guys check the performance too instead of only the numbers?
Because it looks like MS improved their own caching, leaving less to cache for PrimoCache.