How to Fix the Propsys DLL

Reinstall the DLL
1. Go to a website that offers a free download of the propsys.dll file. Hit the 'Download' link and save the file to your desktop.
2. Go to 'Start' > 'Search' and type in 'system32.' Drag and drop the newly downloaded propsys.dll file into the folder. Choose 'Yes' if it asks you if you want to replace the file.
3. Go to 'Start' > 'Run.' Type 'cmd' into the search box and hit 'Enter.' The Command Prompt menu will open.
4. Type the command 'regsvr32 propsys.dll' and hit 'Enter.' This command tells the computer to register the new propsys.dll file.
5. Close the Command Prompt and restart the computer.
Repair the Realtek Driver
6. Go to 'Start' > 'Run.' Enter the command 'msconfig' and hit 'OK.'
7. Click on the 'Startup' tab and look through the list of files for one named 'RtHDVCpl.exe.' This is the Realtek driver, which is related to the propsys.dll.
8. Remove the checkmark next to the 'RtHDVCpl.exe' file and hit 'Apply.' Hit 'OK.'
9. Reboot your PC.