That is not what a GFCI does. But that is what many 'know' by not learning basics. Same myths also claim a missing safety ground causes supply damage. Why do GFCIs come with labels that read "No Equipment Ground"? Because GFCIs are designed for use on two wire circuits - no safety ground. GFCI provides a three prong receptacle for the OP's computer when only two wire circuits exist. GFCIs only need safety ground if one believes hearsay rather than learns code and learn how a GFCI works. Please stop promoting that myth. Why does every GFCI come with a label that reads "No Equipment Ground"? Because GFCIs used on circuits without safety grounds also require that label. Because the code required that label when GFCIs are used on circuits without safety ground. Read code, as I requested, before posting: Article 406.3(D)3 Because of how a GFCI works, no safety ground is required. Using a computer on a two wire circuit with a GFCI does not cause power supply damage. Scary is so many who post hearsay; do not first learn facts.