Q: Can iPad get viruses or what's happened to it?

No. An iPad can't get a virus

Try the suggestion at http://www.wikihow.com/Reset,-Restart-and-Restore-an-iPhone,-iPod-Touch-or-iPad, -or-Fix-a-Crashed-iDevice

Allan

You don't need antivirus or security software as long as you don't Jailbreak your iPad.

Currently there's no known virus affecting iPad.

http://support.apple.com/kb/HT3743

Step by step troubleshooting:

1. Reset

Hold the Sleep/Wake and Home button down togther until you see the Apple logo

2. Restore:

http://support.apple.com/kb/HT1414

3. Recovery:

http://support.apple.com/kb/HT1808