delete - Deleted some files from home folder

I have recently installed Ubuntu for the first time in my life. So I am fairly new to it.

I have deleted some files from my home folder. But now the problems have started. The system volume automatically reduces to zero. Further, as soon as I restarted my system, my panel settings we restored to default.
When I right click in my home folder, it gives an option of 'restore missing files' but I am not able to restore them.

Please guide me how to restore them.

Thanks
Narendra