I spoke with Dell's tech support this morning. Their tech said the problem is related to two Windows updates and that "Microsoft engineers" are looking into it. He told me to uninstall KB2883200 and KB2887595 and then hide them. He said this would fix the wifi problem as well. At first, this seemed to fix both. Unfortunately, when they call me tomorrow for a follow up, I'm going to have to tell them that the tablet is still not waking properly, and it is still dropping the wifi. I'm still having the pdc.sys error message as well. So, it must be something else.
He did mentioned that the problem might be related to TPM (Trusted Platform Module). By default, this is turned on and so is Bitlocker. I'm not going to turn it off though because I don't know what would happen. It was turned on before I bought it, and I'm not familiar with how Bitlocker works.