Error installing 2021 Superpatch w_perrelsuperpatchIS_ttax_2021.350.0100.exe

Hello, I am using TT H&B 2021 Windows Desktop version. I downloaded and tried to install the R35 Superpatch entitled [w_perrelsuperpatchIS_ttax_2021.350.0100.exe]. I have tried with the original CD inserted and without the CD. Here is the error message I get:

The file '_lmth.rwc4nkkl_tnetnocplehlperw' cannot be installed
because the file cannot be found in cabinet file 'Data1.cab'.
This could indicate a network error, an error reading from the
CD-ROM, or a problem with this package.

Any suggestions other than reinstalling the software?

Thank you,  PW