I agree....there is nothing suspicious about the instructions you were given. Creating a restore point is an easy and safe precaution in case the uninstall goes awry.
Anti-virus software components insert themselves into the operating systems core and create numerous files, folders, and registry entries in various locations making it more difficult to remove. It is not uncommon for some anti-virus programs to not completely uninstall itself using the the shortcut in it's All Program's Program folder or the usual method of Apps & features in Windows 10
or Programs and Features
) in Control Panel or to result in various errors due to the presence of related services and processes running in the background.
Most anti-virus vendors provide clean-up utilities
or removal tools
on their web sites to remove remnants left behind after uninstalling, or for a failed uninstall or failed reinstall. Remnants include related registry entries, files and folders created in various areas of the OS.Removal tool for Kaspersky Lab products (kavremover)
Some errors might occur when deleting Kaspersky Lab products via Start > Control Panel > Add\Remove Programs (Add/Remove Programs). As a result the application may not uninstall correctly or remnants of the application may remain in the system. In order to fully remove the installed Kaspersky Lab product, use the kavremover tool...When you remove a product using the kavremover tool, license information is also removed. Make sure you have the license key or the activation code stored elsewhere so that you can use it again later.