Anything you disable in the startup group can always be re-enabled later once the problem has been identified and corrected. Once you have some experience with the system troubleshooter there you will also be able to go into the services tab. But that's where caution is the key word.
To see only 3rd party and no MS essentials listed in the services you first put a check in the box named "hide all microsoft services". That will prevent accidentally disabling anything essential for Windows to run there. Programs like antivirus, tv tuner cards, firewalls are the usual besides seeing items for video and sound cards placed there.
That would be the last place however before looking at hardwares if you are not seeing a problem with more then one thing at once. Double jeopardy comes to mind in that sense where multiple problems could be what you are seeing there making it harder to pinpoint with the things tried so far.