Here's a program that you can test. I was unable to duplicate the same
conditions you have - the closest part I had to a 16F886 that was in DIP
package was a 16F884 so I used that. 

Also I used version 8.05pl2 of the HiTech compiler but the reason for
that would need to be in a different thread.

The command line I used to compile was:
picc -16F884 -Zg9 -O blink.c

Tie MCLR high, hook an LED through a 1k resistor to RC4, apply power and
it should blink about once per second.

Give it a try and see if it works for you.

Cheerful regards,

Bob

#include <pic.h>
__CONFIG(UNPROTECT & WDTDIS & LVPDIS & BOREN & PWRTEN & INTIO &
MCLRDIS);
__CONFIG(BORV21);

void main(){
  unsigned int i = 0;
  PORTA = 0;
  PORTB = 0;
  PORTC = 0;
  PORTD = 0;
  PORTE = 0;
  TRISA = 0;  // no inputs
  TRISB = 0;
  TRISC = 0;
  TRISD = 0;
  TRISE = 0;
  ANSEL  = 0; // no analog
  ANSELH = 0;

  while(1){
    if(!--i){
      if (RC4){
        RC4 = 0;
      } else {
        RC4 = 1;
      }
    }
  }
}


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