Office 2007 will not install :(

i have windows 7 professional version. I tried installing office07 trial version. DOwnloaded the file from internet. Ran the compatibility update for that setup file. It extracts everything but during installation it just frozes or dunno what happens. It shows nothing. No errors no problems. Was looking at that screen for 30 mins and nothing happened. I tried the regedit method. But in my registry file there is no option for HKLM, what i see is HKEY.

PLease help me out.

Hey all,

Managed after 3 days to resolve this issue
I have 4 PCs running Windows 7 RTM (direct from Microsoft BTW)
2 X 32 bit 2 X 64 bit
Only one dell 64 bit machine had this issue all the others where fine with Office Ultimate install so its not obviously not universal
All these PCs had RC running previously and where upgraded by modifing cvversion.ini on the iso see Engineering Windows 7 : Delivering a quality upgrade experience
Never the less updating the old office installs to Office Ultimate 2007 was only a problem on this one unit so not sure why different
Partially resolved by How do I restore security settings to the default settings? following the instructions for Vista to reset security settings then restarted the Office installer.
Low and behold a new error 1317 cannot write to C:\ProgramData\Microsoft\OFFICE\DATA I then installed this permissions fix Take and Grant Full Control Permissions and Ownership in Windows 7 or Vista Right Click Menu » My Digital Life retried and voila success at last!!!
A terribly supported problem I have to say particularly when its two microsoft products
Hope this helps someone else in my position
Best

Peter