From a batch file how can I check if a program is installed?

Question

I'm writing a batch script that needs to install Microsoft Lync if the user does not already have it installed. Then, it will install my custom Lync UI after that. What is the best way to check if Lync is installed considering:

This will run at user logon and should be fast
The user could be using a 32bit or 64bit Windows (XP or 7)

EKS · Accepted Answer · 2011-03-02 15:15:42Z

1

Check if the files either exists in program files or Program files(x86)

answered Mar 2, 2011 at 15:15

EKS

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