I cannot install any MSI files Windows 7 Home Premium.

Question

Hi,
I have searched forums and have not found anything to fix this problem... I can't even install Office!
I get the following error when trying to open any MSI file:
"Windows Installer"
"This installation package could not be opened. Verify that the package exists and you can access it, or cantact the application vendor to verify that it is a valid Windows Installer Package.
Please help me with this microsoft!
Regards,
Eddy

Answer 1

Hi Eddy,
Based on
Sai Siva Kumar's suggestion,
Please try the following methods to solve this issue:
Method 1: Create a new user account
To open User Accounts, click the
Start, click Control Panel, click User Accounts and Family Safety, and then click
User Accounts.
Click
Manage another account.  If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Click
Create a new account.
Type the name you want to give the user account, click an account type, and then click
Create Account.
For your information, please review this article
Create a user account to learn more about how to create a new user account.
Method 2:
Change Environment Variables
Right click Computer from the start menu, select Properties and click Advanced
System Settings on the left.
Select the
Advanced tab and click the Environment Variables button on the bottom
Under
User Variables, select TEMP and click the
Edit button
Change the location for
Variable Value to the desired location ( i.e. C:\TEMP) and click OK
Do the same thing for TMP  and click
OK.
What’s more, it would be helpful for future troubleshooting if you could help to collect the following information:
Did Windows work fine before? If so,
what did you do after it worked fine last time? For example, installed some software or changed some settings.
Have you done some troubleshooting? If so, please tell us what you have done and the results to help us collect more useful information.
Regards,
Lany Zhang