Which Windows Version is running?
Is your Windows up to date with latest updates?
Did you use the 32-bit or 64-bit installer?
Did you explicitly use right mouse "run as Windows administrator" when launching the installer?
Which installer binary did you download and are you using? Maybe check theMD5 or SHA256 code of your download according to the release notes.
Did you check the Windows installer logs and Windows event logs for further information?