Error encountered while trying to reinstall Windows or apply major updates due to 0x800f0991 issue
Error encountered while trying to reinstall Windows or apply major updates due to 0x800f0991 issue
Hey everyone, I've been facing some persistent issues with my Windows setup. It won't apply any updates smoothly—sometimes it crashes during download or installation, either freezing with a blue screen or just not showing one at all. After that, the system restarts right before the update attempt with the error code 0x800f0991. I've tried reinstalling Windows, but it also freezes and then returns to where I left off, just like when I attempted a repair. I've attached some DMP files from recent blue screens.
Under normal usage, everything seems fine until last week. Then random Firefox tabs (144.0) would crash, and playing Battlefield 6 or Silent Storm would cause the game to crash to desktop without any errors. League of Legends works without issues. I ran a full memory test with XMP enabled, but it still reported problems. OCCT tests showed no power instability, and DDU checks passed. I also used various drivers—old ones like 551.86 and 566.36, plus the latest—and nothing changed.
My older Samsung 970 EVO 1TB NVMe drive (2019 model) has been used as a boot drive before being wiped. It hasn't been modified since I built this PC. The drive shows in the attached image with some issues. I've kept it out of use without changing behavior, even when running in safe mode.
I've tried commands like net stop, net start, and changed settings, but nothing resolved the problem. I've also used tools like MemTest86 (with XMP still failing) and OCCT to check for power issues—both came back clean. I've reset some system files and reinstalled drivers, yet the same errors persist.
I'm reaching out for advice because these steps didn't help, and I'm hoping someone can offer a solution. Thanks in advance!
With a fresh healthy drive it continues to bluescreen, and it even stops when you attempt to reinstall Windows. Games and Firefox occasionally crash unexpectedly. After about a year and eight months on your PC—during the Intel Raptor Lake issues and before microcode updates—have you kept up with the latest BIOS releases? Are you running a CPU that might be impacted? This could be a factor, though other causes are possible. Do you have an extra CPU available for testing, maybe borrow one from a friend? You could then try reinstalling Windows using the alternative processor.
Is this the storage device that has hit its maximum capacity? Writing 3000TB in just 20 months sounds significant. You managed to store 50TB during the same timeframe. Have you attempted to reinstall it on a more reliable drive?
This was the old boot drive from my previous computer. I switched to a new 2TB Samsung 990 PRO drive for this one. I’m not sure how it ended up with these numbers, since most of my downloads were on an HDD back then, and this drive was just for the operating system and a few games.
Issue with the faulty disk then... Uncertain why installation fails even after replacing it with a fresh drive. If the bad part was taken out, using a blank new drive might help. The problem appears connected to data or storage errors.
He mentioned this @aurahunt The dump files are scattered everywhere. Storage drivers in one place, filter driver in another (though the filter driver is actually storage-related, ensuring files are managed correctly), CI.dll in one area which handles code integrity, and two Nvidia drivers. Crashes that appear randomly usually point to memory issues. Memory isn't always RAM, but it's typically the main cause. Windows moves low-priority RAM data into the page file when needed, making storage behave like memory—and vice versa. The memory controller is built into the CPU; if it fails, it can make storage look like memory. Since you've replaced the storage component, and despite multiple storage-related crashes it didn't resemble them, any overclocked or improperly voltageed parts should be removed. Look for BIOS settings for automatic overclocking profiles. With Intel, the only straightforward one-click boost is Multi Core Enhancement, which equalizes all core turbo speeds. To test RAM, run the machine normally with a single stick at a time. If only one stick causes crashes, that stick is faulty. If both cause issues, the CPU is likely the culprit. Memory testers often miss defective RAM, especially DDR4 and newer types, so I'm not confident in their reliability. It's possible a 14th-gen Intel model increases the chance it's a CPU problem. If they fail due to voltage issues, memory errors can occur. You're running the latest BIOS, but if it was updated recently, previous damage might still be present. The newest BIOS from May included a final firmware update (0x12F) that reportedly resolved some CPUs with lingering failures. Of course, this could apply to any CPU issue, not just Intel.
I’ve chosen to upgrade the BIOS to the newest version, which also resets any overclocking. I only slightly undervolted the GPU if I recall correctly, but it’s hard to say for sure. XMP was turned off again. The BIOS flash completed without issues, so I hope it’s not the CPU causing the problem. If the next crash comes, I’ll test with a single RAM stick. (It’s really frustrating having to open my PC since it’s stuck to my desk.)
This seems to be an issue with the Samsung software. I'm not sure how it works, but I suspect something went wrong. It's possible that frequent write operations could damage your hard drive over time. What changes have you made to your drive?
I hope I understand what just occurred—just as I saw it. I received a message on Windows mentioning low drive integrity, but since I hadn’t used the drive recently, I wasn’t sure what to do. I’ve included a photo of WizTree taken the day before I removed the drive. Also attached are pictures of my other drives and a screenshot from Crystaldisk from the now-removed drive. Updated: October 29, 2025 by aurahunt