Windows 7 cant install live mesh or some other apps

[lab601]

after instaling the rc and many other apps on it, i cannot install LIVE MESH or office backup plugin.
when i try to run the installer, it says the location of the install files is not valid
this is 64bits install and im a domain admin, what is the workaround, seems like the temp folders arent right or something..

dave

 

[lab601]

i had this working in 32 bits w7 beta