Many of the iPad 2 users are reporting good results from resetting the iPad to its factory default condition. It's also a troubleshooting methodology. Here's what has been working for a lot of iPad 2 users ...
Be sure to do your backups and look at the Apple Support articles so you know exactly what is saved and what is not saved. And then make adjustments for the items that are not saved. Next, make sure the iTunes program on your computer is up to date. Turn off the anti-virus software on your computer for this process. Then run the iTunes program to reset your iPad to its factory default condition. See the following link ...
Choosing an iOS Backup Method (Should I Use iTunes or iCloud to back up ...)
https://support.apple.com/kb/HT5262
Back up and Restore your iOS Device with iCloud or iTunes
http://support.apple.com/kb/ht1766
iTunes: About iOS Backups
http://support.apple.com/kb/ht4946
Create and Delete iPhone, iPad and iPod Touch Backups in iTunes
http://support.apple.com/kb/ht4946
iOS: Troubleshooting Encrypted Backups
http://support.apple.com/kb/TS5162
Use iTunes to Restore your iOS Device to Factory Settings
http://support.apple.com/kb/ht1414