Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on Topic is solved

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Shoonay
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Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by Shoonay »

Was playing around with a few BIOS options on my new AMD PC, configured a few security settings according to this reddit post: https://www.reddit.com/r/buildapc/comme ... urity_not/ and, as soon as the system restarts, after choosing Core Isolation > Memory Integrity on, all I get is a scary BSOD with the words:

Code: Select all

Stop code: ATTEMPTED WRITE TO READONLY MEMORY
What failed: rxfcv.sys
Fortunately resetting the PC boots Windows back to desktop just fine, but Memory Integrity is off.

A quick Google of "rxfcv.sys" points me at PrimoCache, which I am using, so here I am. :mrgreen:

Dunno why Windows has a problem with it, I'm using it PrimoCache for my gaming HDD only which shouldn't affect Windows bootup, right? :?
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Jaga
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by Jaga »

Pretty sure Support has indicated Core Isolation / Memory Integrity doesn't currently work with Primocache due to performance/implementation issues.
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Support
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by Support »

Yes, PrimoCache or Primo Ramdisk is not compatible with Windows Core Isolation / Memory Integrity in order to get best performance. When you install PrimoCache, the setup will check the Memory Integrity setting and ask for turning it off if it is enabled. However, if you later change the Memory Integrity setting, BSOD will happen.
See #015 in the Known Issue List
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Shoonay
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by Shoonay »

Okay, thanks for the explanation.
tverweij
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by tverweij »

Are there plans to support this option, as it becomes more and more important to have all hardware security operational against attacks?
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by Support »

We will consider this and to see if there is a better solution. Thanks.
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uhlik
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Re: Instant BSOD at Windows bootup when restarting after turning Core Isolation > Memory Integrity on

Post by uhlik »

I also prefer the performance penalty over the lack of security. Because of Core Isolation is not supported I had to uninstall PrimoCache on my main production workstation. It's sad I had to stop using software I paid for because you're not able to implement Windows security feature introduced more than 3 years ago.
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