install/uninstall error 2503 and error 2502

1. Goto TaskManager > Details > Explorer.exe & click on End Task.
2. Now Click on File in Task Manager > type Explorer.exe ( here is the trick ) Check the box below shows as ( Create this task with administrative privileges.)
3. Now install / Unistall this should work 100%.

Hi Jordan,

1. What programs are you trying to install?
2. Does the issue occur when you install any particular program or all the programs?
3. Did you make any changes to the computer prior to the issue?
4. What is the exact and complete error message you get?

Method 1: Check the Windows Installer Service

Step 1:

a)      Press Windows key + R, In run Command type services.msc and hit Enter.

b)      Scroll down and find the Windows Installer. Double-click “Windows Installer” in the Services list.

c)      On the General tab, make sure the service is started under “Service status”.

d)      If the service is not already running, under Service status, click Start, and then click OK.

Step 2:

a) Press Windows key +R

b) Type “msiexec /unregister” and press ENTER

c) Press Windows key +R again and type “msiexec /regserver” and press ENTER

d) Restart the computer and check.

 **Method 2:**I would also suggest you to scan your computer with Microsoft Safety Scanner, which would help us to get rid of viruses, spyware, and other malicious software.

The Microsoft Safety Scanner is a free downloadable security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing antivirus software.

http://www.microsoft.com/security/scanner/en-us/default.aspx

**Note:**The Microsoft Safety Scanner expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again.

Important: While scanning the hard drive if any bad sectors are found, the scanner tries to repair that sector, any data available on that might be lost.

 Also, follow suggestions by 'Siarhei Maltsau' replied on

December 7, 2012.

http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_install/windows-8-install-some-software-using-msi/48881523-1a5d-4c43-abc4-01b1ce3ebf3a

Hope you are now able to install programs, if you have any further queries, feel free to post. We will be happy to help you.