Summary: 
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. 


Detail:  This can be caused by a combination of network proxy servers (frequently 
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. 

Remedy:  Use an MD-5 hash to verify the download installer's integrity.  Alternatively, 
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. 









On Thursday, July 22, 2004 at 10:43 am, byrhubarb wrote:

>hello i have had this prob 4 ages now but after spending an hour on the phone to 

>microsoft i have found the problem yay

>r u ready?

>

>open the startbar and openthe run command.

>type         regedit

>ok on the left click + for hkey_local_machine

>then + for sotware

>+ for microsoft

>+ for windows nt

>+ currentversion

>now click on winlogon

>now to the right

>right click allocatecdroms   modify     change the value to 0 

>and the same for the floppy

>if the value was allready on 0 then i cant help sorry but this worked for me 

>

>

>hope this helps

>

>

>
 

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