IPad screen will not rotate. NOT locked, restart and reboot completed. Stuck in Vertical and running iOS version 6.1. Any solutions?

That depends on what version of iOS you iPad is using.

This web link has some good info.

https://9to5mac.com/2018/11/15/rotation-lock-on-ipad/

if it is a 1st Generation iPad you cannot update it as the last running iOS will be only iOS 5.1.1 !
This model is capable of running the last version of iOS 5 designed for the iPad line. It is not capable of running iOS 6 or subsequent versions of the iOS..... Why iOS 6 Just Turned Your iPad 1G Into PaperWeight

You might have your Orientation Lock on. If you are using iOS 7 or 8, swipe up from the bottom and disable Orientation Lock (http://cdn.osxdaily.com/wp-content/uploads/2013/10/stop-screen-rotation-orientation-lock-ios-7.jpg)

Alternately, the switch on the side of your iPad might be set to Lock Rotation, so go to Settings > General and see if Use Side Switch To: is set to Lock Rotation. This would mean that whenever the switch above the volume controls is down, the orientation is locked.

This article may help you. It is for iPhone, but the same operating system runs on iPad as well.

Several months ago I downloaded iOS 7 beta with developer program. It worked fine. When iOS 7 had officially came out, I checked my phone and it restarted on its own. The locked screen said"Activation Error: This device is not registered as part of the iPhone Developer Program. If you are a member of the iPhone Developer Program, please register your device in the iPhone Developer Program Portal at http://developer.apple.com/iphone." I went to the link using my computer, although I am not a developer, and it didn't help me.
Recent days we see lots of iPhone users reported iOS 7 activation error. How did this happened? It is probably because users installed iOS 7 beta 6. As the iOS 7 beta has expired on October 6, which means anyone still running one won't be able to use their iPhone, iPod touch, or iPad, and won't even be able to get past Activation if they try.
If you're experiencing an iOS 7 activation error on your iPhone/other device and were previously using iOS7 beta, there's a good chance to fix it with following simple steps:
1) make sure you have upgraded to iTunes 11.1.1. It is the most recent version of iTunes.
2) Plug you iPhone/iDevice into your computer. Back up the data on the device.
3) Click "Restore" on your device's page in iTunes. If this doesn't work, proceed to DFU mode
4) your device is done restoring and activating you can restore your data from your iTunes backup
5) you can use your non-beta iOS 7
If iTunes says there is no newer version to upgrade to, you can put your iPhone or device to DFU mode after the backup. DFU (Device Firmware Update) mode will make sure you download and install the latest release version of iOS off of Apple's servers.
1) Plug your iPhone, iPod touch, or iPad into your Mac or Windows PC and make sure iTunes is running.
2) Hold down both the Sleep Button (on top of your device) and the Home Button (on the front underneath the screen).
3) Keep them both held down from about 10 seconds. (If you see the Apple logo, you've held them too long and will need to start again.)
4) Let go of the Sleep Button but keep holding the Home Button for about 5 seconds. (If you see the "Plus into iTunes" screen than you held it too long and will need to start again.)
5) Restore the device

This tutorial will explain how to force your iPad to restart if it gets stuck or freezes up.
Forcing your iPad to restart will not cause any loss of data - with the possible exception of any work you were doing at the time the iPad and/or App froze, forcing you to restart it.

Click and hold down the Sleep/Wake button (located on the upper-right corner of your iPad). While you're holding down the Sleep/Wake button, hold down the Home button as well (located on the front of your iPad at the bottom). Hold down both buttons until your iPad powers off. It will reboot and start again with a small silver Apple image on the screen. It takes about 30 seconds for the iPad completely start up.

no, you can not. there are some web sites that have to older versions of the apps. do a search for iOS 5 app

The first generation iPad is not upgradeable to iOS 6. iOS 5 is the last version that will run on that device. Time for a new iPad... you can trade in the old one or sell it yourself. Be sure to use iTunes to back it up. When you get your new one, restore using iTunes to your new device and all your data will be available (and LOTS of software updates!). Then, plug the old iPad into iTunes and reset it to factory settings - clearing your personal data and making it ready for the next owner.

The Lock Rotation setting may be on or off, and that affects whether or not it will automatically reorient. How to change that depends on which version of iOS you have and whether or not you have set the slide switch on the side next to the volume buttons to control Mute or to control Lock Rotation.

It is a quite frustrating thing that your iPad turns into blue color and your tablet reboots when you are using one of iPad apps. The "iPad Blue Screen of *****" issue leads to our iPhone unresponsible and will affect our normal mobile life a lot. It seems that it's most frequent to U.S. T-Mobile users. iPhone 6, 6 Plus, 5S and others are affected, so there doesn't seem any device related problem. If you are also faced with the "iPad Blue Screen of *****" issue unfortunately, no worries, here are several solutions for you to fix it.

1. Update or Delete the App
2. Hard Reset Your iPad
3. Update to the Latest iOS Version
4. Restore iPhone to Factory Settings
5. Turn off iCloud Sync

Please click the following link to get more information and steps about the solutions.
http://www.leawo.org/tutorial/how-to-fix-iphone-blue-screen-of-*****.html

Try reseting the iPad by holding the home and power buttons simultaneously until the iPad completely shuts down and the Apple logo appears.


Once the Apple logo appears you can release the buttons. If this does not work, you may need to connect your iPad to your computer and do a factory restore using iTunes.