Continuous restart after migrating to SEP 12

Hello

Last friday, I migrate SEPM 11 console to the latest version SEP 12.1.2015.2015

Then, move the SEP 12 clients to the new console SEPM 12 using "Update communication packge" option in "Add client" option on Clients tab

Since yesterday monday, i'm having problems with many PC (Running Windows 7, Windows 8 or XP) restarting constantly

I'm not 100% if this problem has anything to do with the migration, but wonder if anyone had problems of such type, related with SEP.

Thanks,