There's no way to prevent issues that I know of. Removing an older version after a new one is installed has caused problems. You may have to reinstall 5, or worst case scenario, wipe the system drive and reinstall everything from Windows on up.
That's not to say things will go badly, just that they might. Be prepared.
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If you have a USB hard drive, make a full backup of your laptop drive to your external before doing anything... so you may do an easy restore if you have problems, and you don't want to deal with wiping everything and installing new
The product I use is at http://www.terabyteunlimited.com/image-for-linux.htm
Image runs off of a bootable CD via Linux (the Zip you download includes a program to make the bootable CD) and it reads EVERYTHING on the drive, even the hidden registration information, so everything is restored when needed... and you may restore the image to a brand new drive in case of a crash, and not have to re-install anything
Thanks for your input. I think that I will look in other areas of my computer to free up space.
Regards and thanks for your help.