the power spike ang nakaguba tingali sa imong PSU bai, d ang imong pag cgeg gamit sa pc nimo...
the sudden low dip sa voltage current sa inyoha then mutaas napud, could have busted your PSU... i suggest you buy an AVR jud bro for sudden voltage spikes, d lang imong computer maguba ana... hasta pud inyong appliances.. tv, ref etc.. anything connected diretso sa outlet... could be a victim of a sudden low current spikes... may gani wala uban ninyong appliances naguba sad bai...
tambag nako bro.. better buy an step-up/down transformer nalang for worry free mind....