Laptop and high PCs can both suffer from latency.
And it’s not only heat that can suddenly cut in and give the computer more to think about, causing the stuttering, other background tasks Like network hunting, drive searches, recording and dozens of other things in the computer can cut in and cause latency issues
Again , try pushing the latency setting up to its highest and run a playlist nonstop for a few hours and keep checking it for stutters and stuff. If it all sounds good at massive latency, reboot and try the test again with the latency a bit lower. When it starts stuttering, take the latency back up a bit.
Sometimes new versions of the same DJ software can give the computer headaches. Some reports for example of the VDJ version with Vocal separation stuff on it has had bad stuttering and distortion on computers which were ok running more slender versions of VDJ without distortion.
Other simple things. Usb drivers, Usb lead, other Usb devices drawing power, powered speakers sending DC back to the 7000? Shrug