SOLVED: Installation Error Code 2502 & 2503

I was recently working on a Sophos encryption install on a Surface Pro 3 but was presented with “Error code 2502″ followed by “Error code 2503″ .  Sophos was not helpful with this but I found that the problem is not unusual in Windows 8.1 machines and it has an easy work around.

You need to not use, or to elevate EXPLORER.EXE.  The two easy ways to do this are:

Don’t use Explorer.exe

1. Click Start and find CMD
2. Right click on and RUN AS ADMINISTRATOR
3. Type in the path to your MSI and press enter

Elevate Explorer.exe

1. Click Start and find CMD
2. Right click on and RUN AS ADMINISTRATOR
3. Type TASKMGR
4. End Task on EXPLORER.EXE
5. Click FILE, NEW-TASK (RUN)
6. Enter EXPLORER.EXE
7. Using COMPUTER or THIS PC, find the program you want to install and double click on it

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