I cannot install Parallels Tools. Installation fails with an error: "Error 1935. An error occurred during the installation of assembly component. HRESULT: 0x800700C1"
This error message indicates that some of the system files (dll) are missing or corrupted.
Please try to repair your system: - Start the virtual machine
Go to Start, type 'cmd' (without quotes') and hit return/Enter
Right-click on cmd > Run as Administrator
sfc /scannow and hit Return/Enter
If the system cannot be repaired, you will get a message: "Windows Resource Protection could not start the repair service".