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#280
Besides the Hyper-V you have the other 3rd party ware as far as VMs go. As for VMWare's Workstation Player that does't work across the cloud but creates an environment on your machine which stores the VM as a file on the local drive. The AV software you have on would still provide protection for the main OS while connecting online by VM at times can prove risky if the connection is made.
Most of the time a VM is seen for being able to run and try out some other OS if not simply running an older version of Windows so older apps can be used. As for dual booting across two separate drives Kaspersky shouldn't be interfering or you may want to consider going with a different software. First however you may want to spent a little time at Kaspersky's support site looking things up.
As far as the dual boot set up when you already have the two versions installed each on separate drives editing the intended host OS's BCD store to add in the boot entry for the other which in this case would be 7. To simply that since you already have two working copies of Windows 7 and 10 already in use you can use a gui method to add 7 into the existing 10 install with a little help from a 3rd party app many have been using since the Vista days.
What does is leave the 7 drive totally unchanged in any way. The two main options are either the manual edit of the BCD store with the command line BCDEditor tool or the EasyBCD app developed about 10yrs. After having dual booted prior to the development of the BCD store even like XP with 98SE the introduction of the BCD store first seen with Vista and the gui app being developed that made dual boots easier to set up when both OSs were already running but on separate drives typically as "Stand Alone" types of install isolated from each other.
What the guide here does is explain how to proceed before 10 first goes on. But with 10 already on you can simply the process even further by simply editing the BCD store to add in the boot entry for the existing 7 install without fuss. No need to install 10 a second time or split up the 7 just to get on when you already have 10 up and running. This will still have to be your decision there however. All anyone can do here is point out the options.