You might be able to find more detailed logs somewhere (either in workspace log file, or in Eclipse error view). Is the zip corrupted by your proxy maybe?
An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.cdt,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile1826350598055756842.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile1826350598055756842.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.cdt.source,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile4926162377841691661.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile4926162377841691661.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.core,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile2795592780726364592.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile2795592780726364592.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.core.source,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile7739707268773440042.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile7739707268773440042.jar
Problems downloading artifact: org.eclipse.update.feature,org.sonarlint.eclipse.feature,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5365128529731074265.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5365128529731074265.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.jdt,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile9075075637317133420.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile9075075637317133420.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.jdt.source,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile3700390567757575528.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile3700390567757575528.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.m2e,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile8911151320121197510.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile8911151320121197510.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.m2e.source,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile9140142231290614538.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile9140142231290614538.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.ui,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5560022378190681380.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5560022378190681380.jar
Problems downloading artifact: osgi.bundle,org.sonarlint.eclipse.ui.source,4.1.0.201901311043.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile6241656913416196497.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile6241656913416196497.jar
Problems downloading artifact: osgi.bundle,org.sonarsource.sonarlint.core.sonarlint-client-api,4.1.0.2218.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile557386913649956522.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile557386913649956522.jar
Problems downloading artifact: osgi.bundle,org.sonarsource.sonarlint.core.sonarlint-core,4.1.0.2218.
Error reading signed content:C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5767361532577956571.jar
An error occurred while processing the signatures for the file: C:\Users\GEORGE~1.MAC\AppData\Local\Temp\287\signatureFile5767361532577956571.jar```
To me it doesn’t look like a corruption of the zip. Could be your antivirus software preventing the installation. Also, can you tell us the version of Eclipse (and JDK) you are using?
SonarLint requires java 8+ as a runtime. Regarding the Eclipse version, we may support Luna (4.4) and later, but our automated test suite is only testing Neon (4.6) and later.
So your setup is definitely too old to use SonarLint, sorry.