Here is link for Windows 7 support for our Appliucations:
http://www.cisco.com/en/US/partner/prod/collateral/voicesw/ps6789/ps7046/ps7282/product_bulletin_c25-563280_ps5905_Products_Bulletin.html
Full Support for windows 7 in 32 bit esists now per link
WoW64 - Version 7.0.4,
I have installed 7.0.4 & 7.0.5 in my windows 7 32 & 64 Bit Machines without issues
I would suggest you disable all AV and or intrustion detetion SW and try again.
Symantec Threat potection sometimes stops our voice apps
you really should not be seeing any issues, if persists please open a TAC case and we will sort it our for you.
George