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MacOS hides some files by default, so there’s a chance your PDF is still there, just hidden.
Try this: open your Downloads folder and press Command + Shift + Period (.) — this will reveal hidden files (they’ll look slightly faded). If your PDF shows up, you can move or open it normally.
You can also try using Spotlight Search by pressing Command + Space and typing the file name to see if it pops up.
Another option is using Finder Search — open Finder, press Command + F, and search for the file name or type (make sure “This Mac” is selected).
1. Run these commands in Command Prompt as admin:
sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth
2. Update all your drivers (especially graphics and chipset).
3. Check Windows Event Viewer for error details.
4. Remove any recent Windows updates or programs if the problem started after installing them.
5. Test your RAM using Windows Memory Diagnostic and check your hard drive with:
chkdsk /f /r
6. Update your BIOS if needed (check your motherboard website).
7. Do a Clean Boot to check for software conflicts:
Open msconfig, disable all non-Microsoft services.
Disable startup programs in Task Manager.
To fix the amdppm.sys BSOD, start by completely removing your AMD drivers using the AMD Cleanup Utility, then reinstall the latest chipset and graphics drivers from AMD’s website. Make sure your BIOS is updated to the newest version, and disable AMD power-saving features like Cool’n’Quiet or C-State in the BIOS settings. Keep your Windows system fully updated. Also, check your RAM and hard drive for errors using built-in diagnostic tools. Finally, perform a clean boot by disabling all non-Microsoft startup programs and services to rule out software conflicts. If the problem continues, use tools like BlueScreenView to analyze crash files for more details.
The afd.sys BSOD usually happens because of network problems. To fix it, reset your network by running these commands in Command Prompt:
netsh int ip reset
netsh winsock reset
ipconfig /flushdns
Update or roll back your network drivers. Make sure Windows is up to date. Try turning off your antivirus or firewall for a bit to see if that helps. Run sfc /scannow to fix system files. Also, check your router and cables. If it still crashes, try restoring Windows or reinstalling it.
Is the SD card visible on your phone but not on your mother’s phone? If that’s the case, why don’t you simply insert the SD card into your phone and make a backup of all the data?
Since you’ve enabled virtualization, Secure Boot, TPM, and Memory Integrity, try these:
1. Make sure your CPU supports CET (most 12th Gen Intel do).
2. Check BIOS/UEFI and enable CET or Shadow Stack if available.
3. Update all drivers, especially chipset and GPU.
4. If using Windows Pro/Enterprise, check Group Policy settings for Device Guard.
5. Verify Memory Integrity is on in Windows Security.
6. Run sfc /scannow and DISM /RestoreHealth to fix system files.
If it’s still off, check Event Viewer for errors—some drivers or software may block it.
@johnjacobb40, you are right. You’ve done most of the necessary steps already. Next, confirm that your CPU supports CET and enable CET or Shadow Stack in your BIOS. Make sure all your drivers are up to date, and if you’re using Windows Pro or Enterprise, check the Group Policy settings. Also, verify that Memory Integrity is enabled in Windows Security. Running system file checks using sfc /scannow and DISM /RestoreHealth can help fix any issues. If the feature still doesn’t turn on, check the Event Viewer for errors, as some drivers might be blocking it.
vgk.sys is part of Riot Vanguard, the anti-cheat system for Valorant. If it causes blue screen crashes, run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth in an administrator Command Prompt.
Disable or uninstall any other antivirus or anti-cheat programs that might conflict with Vanguard. Update or roll back your graphics and network drivers. Do a clean boot to check for software conflicts.
Make sure the Vanguard service is running and update your BIOS if needed. Finally, uninstall Vanguard and Valorant completely, restart your PC, and reinstall them.
nvpcf.sys is part of NVIDIA software. If you get blue screens after updating, try this: fully remove NVIDIA drivers using DDU, then reinstall the latest drivers. Turn off any GPU tools like overclocking apps. Run sfc /scannow to fix system files. Update other drivers and Windows. Test your memory and GPU for hardware issues. If the problem started after a driver update, try an older driver. If it still crashes, the full error code can help.
The 0xC1900101 – 0x20004 error means a driver or compatibility problem is stopping Windows from installing. To fix it, unplug extra devices, update your drivers, and free up disk space. Turn off antivirus, check and update your BIOS, and run the Windows Update Troubleshooter. Try a clean boot or install Windows from a USB. If it still fails, check for bad drivers and update or remove them.
If you see “TPM has malfunctioned,” restart your PC first. If it keeps showing, go to BIOS settings, clear or reset the TPM, and make sure TPM is enabled.
Update your BIOS and TPM driver, and install Windows updates. If the problem stays, the TPM hardware might be bad and need fixing.
If you see “Required Files Are Not Trusted,” restart your PC. If it keeps happening, turn off Secure Boot in BIOS, run sfc /scannow in Command Prompt, and check your date and time. Install any Windows updates. If it still doesn’t work, use a USB installer or check for bad drivers.
If WMI Provider Host is using too much CPU, restart it in services.msc. Check Event Viewer for errors under WMI-Activity > Operational, find the PID, and match it in Task Manager to see which app is causing it. Update or remove that app. Run a malware scan and restart your PC.
Hi,
I’m facing a similar issue and have already tried all the suggested steps. However, my main concern is that I can’t find the PID in Task Manager, so I’m not able to identify which application is causing the error. Could you please suggest any other solution to help me diagnose or fix the problem?
Of course, Beatrice.
With the help of the Stellar Photo Recovery tool, you can easily recover your lost pictures from your SD card. Try it yourself.