Vista and Win7 is the same as the following

Solve the problem of can not install the software under Win7

There are a lot of Vista users often encounter this problem, the system alway prompts "can not access Windows Installer service" when we install a piece of software. It would often happened especially in install the. Msi installation package.
Actually been to the latest Windows7, the problem has still exists, mainly caused by Windows Installer Service of Microsoft. The installation package  which end by Msi extension need to call this service in the installation, and once the service is wrong, it will lead to the error.
The solution is simple, Vista and Win7 is the same as the following:
* Start - All - Accessories - Command Prompt.
* Right click - Run as Administrator.
* Enter the following information and press Enter: "reg delete HKLM \ SOFTWARE \ Microsoft \ SQMClient \ Windows \ DisabledSessions / va / f"
* Restart your Vista or Win 7 system.
Of course, we might say, is just the registry operator. But we need to operate the registry via the command line (command-line program requires administrator). We can run regedit.exe to open the Registry Editor, locate the HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ SQMClient \ Windows \ Disabled Sessions.