Users report 2 GB of memory missing in recent Windows 10 builds

Madalina Dinita
by Madalina Dinita
Affiliate Disclosure

Many Windows Insiders reported the recent slew of updates released last week, caused their computers to use more memory than before. As a result, Windows’ interface sometimes hangs and pauses.

One user explains that before he installed the updates, he had 4 GB of free memory out of a total of 8 GB. After installing the updates, meaning the latest Insider build and cumulative updates KB3197954 and KB3199986, there is only 1.5 GB of free memory left.

Despite using various workarounds, such as clean booting, creating a new account, running chkdsk, SFC, and dism, and uninstalling KB3197954 and going back to 14393.321, he couldn’t fix the bug.

the recent slew of updates released on or around 10.20.16, have caused windows to use a lot more memory than it did before. there have been no software or hardware changes to my system. before the updates, I would have around 4 Gb’s of 8 Gb’s free. now I have 1.5 Gb’s free out of 8 Gb’s. and this is causes interfaces hangs and pauses in windows. I tried clean booting and the amount of free memory was still less than it should have been. […] uninstalling KB3197954 and going back to 14393.321 which was installed after the update in question,  but the amount of memory used did not decrease.[…]

After additional detective work, the user who reported the problem managed to identify the culprit: Diskeeper 16 Pro. This tool’s role is to boost Windows laptops and workstations’ performance. However, judging by these recent user reports, Diskeeper 16 Pro is actually consuming all the available memory, causing UI pauses and OS delays.

I went in to Disk Keeper and turned of the auto defrag and other features (intelliwrite, smart caching, etc.) and then told it to start a manual operation on both my drives and then I stopped it, so that no defrag process was in progress. in less than a minute, my available memory went from 1.6 to 5.1 Gb. I re enabled the disk keeper features and my available memory was gradually consumed again.

What is surprising about this forum thread is that 1K Insiders viewed it. Most likely, not all of them use Diskeeper 16 Pro. This means that they’re also experiencing missing memory issues, probably caused by a different factor.

After publishing this article, Condusiv Technologies, the manufacturer of Diskeeper contacted us to set the record straight. The company guarantees that Diskeeper doesn’t compete for memory with any other application that you are running. This is what the EMEA Technical Director at Condusiv Technologies told us:

Firstly, Diskeeper 16 DOES use a significant amount of memory on most computers. This is mainly used for the RAM caching feature, which is very beneficial to system performance. The product will typically use up to half of what Windows reports as “Available Physical Memory” for this cache.

Here is the important point though; the cache is dynamically sized. If the memory usage by other processes increases, Diskeeper will shrink its cache and hand pages of memory back to Nonpaged Pool so as not to compete for memory with ANY other process that is running on the computer. Moreover, it will always leave 1.5GB free memory, even if Diskeeper’s cache size has had to shrink to zero.

Have you also experienced memory bugs after installing the latest Windows 10 updates? Tell us more about your experience in the comment section below.


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My name is James Fields from Condusiv’s Customer Support Team and I wanted to give some insight into our new Diskeeper 16. Diskeeper 16 introduces a new patented technology called IntelliMemory to further enhance Windows system performance by using available idle/unused system memory to satisfy hot read data request from DRAM. Using this unused resource provides big performance gains, in fact data served from DRAM can be 10x-15x faster than going to SSD. The read only cache is dynamic and will self-adjust to ensure that there is never a memory starvation or resource contention. This means that as memory is needed by other applications or if the available memory drops to a level below a calculated threshold, then Diskeeper will dynamically flush data from its cache to give back to Windows. It is normal to see more of your “free” or available memory to now be in use providing fast data access than you have seen before.

Well, lately I struggled because of DK16. My non-paged pool memory went up to 3GB of 8GB installed RAM, pushing the memory usage up to 70-75% on idle. When opened a browser, after 2-3 tabs opened the mem. usage reached 90% and the PC slowed down a lot. After uninstalling the DK16 those numbers were decreased to 35-40% and 50-55% respectively. I didn’t have this issue last year, some W10 update may went wrong idunno.