Windows 7: Can I use the software loaded in a HD from another HD with Win 7?

I would like to open and work with software programs loaded in any of the 6 HDDs I have connected to my Desktop computer, They are internal and external connected via an external enclosure. Is this possible in some way? or do I need to install every software program on every hard drive do do that?



Maybe this is a very elementary question but i have not yet been able to work it out.
Also I do not seem to be able to access the desktop of my PC sand make it show icons or shortcuts stored on another hard drive, all I can see is the desltop contents of whichever drive is acting as as the C drive at the time.

Could anyone shed some light over this in an instructive manner given my limitations with computer science.

Thank you kindly

If you're asking whether you can install and run software from some disk other than the system (C) drive, usually yes.

If you want to transfer a disk from another PC and run software that's installed on it, usually no. (The operating system on the new PC wouldn't "know" about the software installed on the added disk.)

Most software requires installation, which puts necessary information in the Windows Registry. There are exceptions, but they are fairly rare.