While installation SQL Optimizer for SQL Server 6.5 I got the following error message:
Failed to start C:\DOCUME~1\<username>\LOCALS~1\Temp\QuestInstaller\\ComponentSetup.exe
Error message: The system cannot find the file specified.
Error code 2
Corrupt installer file
The SQL Optimizer for SQL Server installation file is corrupt.
Please download it again from our webpage: http://support.quest.com => Download & Updates