I deleted an app then tried to install another app but it won't allow.also I can't tap on items attached to emails

Hi 16david56! Thanks for using the Apple Support Communities!

I have reviewed your issues and I have found a couple articles that I believe will be relevant to the issues you are seeing. This article:

iOS: Troubleshooting applications purchased from the App Store

http://support.apple.com/kb/ts1702

and this article:

Troubleshooting iPhone, iPad, and iPod touch accessories

http://support.apple.com/kb/ts2634

should help you get on the right path to resolving both issues. If you are still having issues after completing the rest of the steps in that article, then I would advise that you visit getsupport.apple.com and choose one of the support options to get in touch with an Apple technician to resolve your issue.

Regards,

Braden

iPad Frozen? How to Force Quit an App, Reset or Restart Your iPad

http://ipadacademy.com/2010/11/ipad-frozen-how-to-force-quit-an-app-reset-or-res tart-your-ipad

iPad: Basic troubleshooting

http://support.apple.com/kb/TS3274

 Cheers, Tom 😉