Yes, We do work on Apple computers and laptops.
If your wifi system is configured correctly, the number of streaming devices shouldn't pose an issue.
Windows computers typically need "tune-ups" from time to time. There are many possible causes. Slow startup issues are typically related to the number of processes needed to run on the computer and it loads these processes during startup.
There could be many causes, but the most common cause is a network that hasn't been properly set up.
This would begin with an analysis of the current network. Properly setting a network and insufficient wireless access points is a common cause.
Blue screen of death, blue screen, or BSoD, is an error screen displayed on a Windows computer system following a fatal system error. It indicates a system crash, in which the operating system has reached a condition where it can no longer operate safely.
Most consumer-grade printers have wireless capabilities. Check with the manufacturer of your printer.