hi there, i installed Windows 7 Ultimate x64, build 7600 now 4 times on my Laptop (Samsung C2D 1,6GHz 1GB RAM) 1install: after updating the win7 and installing Office 2007 OLP the windows installer is something corrupt i dont kow. -> i cant install any kind of msi nor peace of software which use the installer eg. adobe reader oder sun java 2install: i just wantet to test if the problem exist if i dont install office , so i just did the windows update and tried to install adobe reader. same problem 3install: i just installed a fresh windows 7 ultimate and tried to install adobe reader. same problem. Problem Translated from german to eng.: dont care about syntax ^^ Windows Installer: This Installation Paket could not be opened. Make sure the pakage exist and u have access to it. Or let the vendor proove if this is a valid windows Installerpakage. Do`s to fix the problem (solutions) - make the registry tweak for the SQM, disabling quality bla... (known beta error) doesnt fix the problem - tried to set a new temp dir with new ntfs rights (doesnt work) - give ALL users access to the temp dir (doesnt work) Consider that i testet same OS on my Desktop Machine, no errors at all there... I didnt had have the problem as i was testing the RC1 Ultimate on the same Laptop. Its gonna make me crazy... ;( im out of ideas now, can somebody help me ?