External Microphone Camera?

Ok, so recently i just got a external microphone (Takstar SGC-598) and a adapter for my iPhone 6. So I tried making a video/ recording audio and its not recording from the mic(takstar). Is there any thing in settings or something I can do to make it record from the takstar mic?

My external mic isn't working? Someone

So I just received my external mic for my Iphone, it has the end of like an aux cord so it fits in my phone and I don't need an adapter. But when I tested it, sound only recorded from the built in microphone and not the external mic. The phone seems to be recognizing it as headphones instead of a mic, is there a setting I need to change?!

How can I update iTunes on a windows 8 asus laptop?

I recently bought an iPhone 6s and I'm trying to restore my backup from my old iPhone. But my iPhone 6s is not compatible with the version of iTunes I currently have, so my laptop prompted me to update it to version 12.6.1. Halfway through the installation, it stops, and a window pops up that says "iTunes has an invalid signature. It will not be installed."
I can't restore the backup until I update iTunes, so I tried to back up my old iPhone to iCloud, but every time I try, a window pops up that either says "there's not enough space to complete the backup" or "the iPhone has been disconnected" (which it hasn't.)
I don't have time to go to Verizon or the Apple Store for the next 3 or 4 days, so I'm out of options. Any suggestions?

I dropped my iphone 4 in the toilet? - 3

Yeah that sucks anyway i took it apart dried it put it in rice all the phone drying cliches, my phone will vibrate when i turn the switch to make it change to silent mode and it will vibrate when i plug it in, but the screen stays blank, even when i hold the power and home buttons.