Does anyone know, Why is it whenever i download the software it will disappear a day or so later and i have to reinstall it?
Can you clarify what you mean that the software "Disappears"?
Run CHKDSK on your Windows drive to see if there are any problems with your HDD/SSD.
Also run in a Elevated Command Prompt or Powershell - SFC /scannow. This will check your Windows OS for missing files or corruption.
Do you have Win 10? Laptop? INFORMATION REQUIRED WHEN POSTING A QUESTION
Have you taken the necessary steps to prevent Microsoft from installing/changing drivers automatically?
Sounds like your antivirus or antimalware software is flagging it and uninstalling/quarantining it.
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