Cubase 9.5.21 not installing

Hello,
I don’t know why but I got a message : Checksum error in Cubase 9.5 updates \ additionnal contents\vst sound \ preset vst sound \FCP_SMT_232_ HSSE_ flx _presets_vst sounds…
What is it ???

The download might be incomplete or corrupted. Just download the update again and it should work.

Thank You , I did download with another computer and the installation is ok !!! May be the fault of my antivirus who said to don’t instal the update …