Error+1335+data1.cab+is+corrupt

Problem
When installing Virtual Weather Station, I get the following error: Installation error 1335 data1.cab is corrupt

Solution
Please disable your anti-virus tool on your computer or network.

Discussion
Network anti-virus scanning tools sometimes interfere a user's download of an installation program. When the installation program is run (i.e., setup.exe), the commonplace "Installshield" mechanism cannot validate its own integrity - hence it exits with the cryptic "1335 data1.cab is corrupt" or something along those lines.

found on 'sophisticated' corporate networks & 'sophisticated' public wi-fi spots) that can redirect content to an antivirus or content scanning tool for further inspection of viruses or malware. Vendors such as Bluecoat, Web Washer or Symantec and Microsoft ISA among others market proxy servers/content filters as one or more solutions. Each one of these tools may have an ICAP-compliant component which may change your download. make sure that if your download program is digitally signed that the 'Digital Signatures' reports "the certificate is OK" in the advanced details button. Otherwise, contact your helpdesk or someone who can make an exception or allowance for your download.
 * Detail**: This can be caused by a combination of network proxy servers (frequently
 * Remedy**: Use an MD-5 hash to verify the download installer's integrity. Alternatively,