Hi
This the desktops thread and if you post in the Notebooks thread you may get better help.
I dont believe there is a direct update path from MSDos to W7.
I think you will have to research the possibility of drivers etc not being readily available, and how perhaps find your own.
If you mean from FreeDos to Windows 10, then...
http://windows.microsoft.com/en-us/windows-10/compatibility-report-windows-10