Eddy
9
Also i will install the same product but newer version, so why more "clean" installation? What is the point here?
Several reasons.
1] Systems get slower over time because of (not limited to) remnants of "removed" things.
2] It will remove leftovers that can cause problems.
If you want to lay new carpet, you don't leave parts of the old one (e.g. the glue) on the floor before laying the new carpet, right ?
Deleting things in the registry is not dangerous at all.
It is only software, and so what if a system doesn’t boot because you made a mistake…
Simply put back a image or install everything from scratch.
And ofcourse there is the option to create a backup of the registry so you can simply restore things if it turns out you have made a mistake.