Computer Management and Add Snap-in Dialogue

Hi

I've been trying to get a spare computer we have to run from a 128GB SSD as a dual boot system and, using Partition Wizard, copying Win7 and Win10 from two 60GB SSDs. Quite a simple task you may think but it has taken just over two days to do it. I finished up using a spare second 128GB SSD to do it as somehow or other the MFT on the first one went corrupt plus I think I have cable problems.

Anyway, whilst I now have an acceptable system I do have a little niggle about Win7 in that whenever I select Manage from the Computer context menu, Win7 always has to go through the process of Adding Snap-in. I tried searching the internet for information but it looks like no one has ever had that problem. I am therefore hoping that someone on this forum may have the answer as to why this keeps happening. I'm not really unduely worried about it as it opens up a dialogue that is only rarely used but it would be nice to clear this problem up. So, if anyone has any idea as to why this happens and how to stop it happening then I would be very grateful if they could give me guidance.

Tracey