silvertones
heres what i suspect is going on here.
and its only a suspicion and i might be wrong.
and i dont know the internal workings of RB obviously.
or your toshiba. its difficult without being there.
and my comments are based on your task mgr pic.
that your system is lightly loaded.

you mention this "sticky video" aspect.
depending how a daw is coded while playing back if i remember some daws
get their time positional info from the sound device.
(via a windows api that the programmer can use. )
or the only other way is the daw calculating the time position itself.
its been known that some sound devices sometimes dont send the correct
time position back to the daw.
whether this is your situation i just dont know,
its just a possibility i'm throwing out.
based on the fact your idle process is high hinting that your system
isnt under heavy load.

based on the above my question is...
1. what is the sound device that is being used ...creative ??
(this is one reason i asked for a pic of your preferences.
44.1/16 ?? ..mme or asio ?? )
2. if its usb do you have any other usb devices shareing the usb bus ??
reason for this question is the possibility that some other usb device is affecting the performance of the sound device.

heres how i would progress on this if i were in
your position.
process of elimination.

i would firstly test out another sound device.
if you find the situation is resolved, then the problem is probably
the current sound device your useing.

retired puter engr....powertracks on amd......NICE !
"what is the black art of audio engineering ?"
my silly songs...motagator.com/bmanning
see my tips in the tips section.