I've looked in my "windowssystem32driversetchosts" file and
found a number of entries that all begin with 127.0.0.1.
1. What are all those identical seemingly IP addresses,
127.0.0.1?
2. The sites listed, are they on my system and bad or are they being
blocked from my computer to reach them (just like what you had stated
Sasser, sometimes does to reach Anti-virus sites for definition
updates?
3. What should I do with this list? Shall I delete these sites and
only keep the localhost line?
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127.0.0.1 is "special", and refers to your own computer. It's used
for both good and evil. The trick here is to understand which, and
perhaps how these entries appeared on your computer in the first
place.
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What are these 127.0.0.1 entries in my system hosts file?
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Source: What are these 127.0.0.1 entries in my system hosts file?