Error 1327 Invalid Drive: G:\ when i try to install a program

Hi all  Can anyone help. When I try to install a program, it comes up with the above error message. Why? This has only just started happening and I don't know why. I haven't changed any sttings to my knowledge.
 
Question Info

Last updated August 15, 2018 Views 69,482 Applies to:
Answer
Please perform the following:

Click the Start Orb and type CMD in the search, Right Click the Command Prompt Icon and left Click Run as Administrator
In the Command Prompt type the following:
subst G: C:\
Hit Enter

Attempt to install desired software

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