Online Security

Service Notices

Maintenance Scheduled
You may experience service interruptions on March 8/31/2018 in unit 4 and unit 10 while crews upgrade equipment.

Sonora (209) 588-9601
Groveland (209) 962-6373


Service Notices

Viruses, Trojans and Worms

The word virus is often used to describe three different types of computer infections: worms, trojans and viruses. These are malicious programs that get installed on a computer, often without the knowledge of the user, and can lead to privacy being invaded and/or data being destroyed or corrupted on users’ hard drives.

These infections are primarily spread in the following ways:

  • Viruses: via e-mail attachments and file sharing
  • Worms: by being connected to the Internet without effective protection. Often spread by email.
  • Trojans: by visiting corrupted web sites or by installing software that contains hidden programs.

Symptoms of Problems

Symptoms of an infected computer include:

  • Computer is unstable and crashing frequently
  • Slow Internet connection
  • You receive a call from your Internet technical support alerting you of the situation

Recommended Solutions

  • Install a virus-checking program, and keep it up-to-date. It is worth noting that some viruses will disable virus checkers and you may need to try a few different programs to find and remove an infection.
  • Install a firewall or router that has a firewall built in. Note that the built in Windows 7 (or higher Windows version) firewall is adequate for most home users.


  • Do not open e-mail from sources you are not expecting
  • Do not open any attachments unless you are expecting the file even if you know the sender. Some malware spreads by secretly emailing itself to people in your address book.
  • Have a good virus checking program that is kept up-to-date
  • Have a good firewall installed and running
SNC Location Map
Our Address:
16913 Amy Drive
Sonora, CA 95370
Mailing Address:
PO Box 281
Standard, CA 95373
Hours of Operation:
Mon. to Fri. 8am to 5:00pm

Tuolumne County Service Area: Cable TV, high speed internet, and VoIP telephone service areas include the Hwy 108 communities of Sonora, Columbia, Jamestown, Soulsbyville, Twain Harte, Strawberry, Longbarn, Cold Springs and Pinecrest, and the Hwy 120 communities of Big Oak Flat, Groveland, and Pine Mountain Lake. Not all services available everywhere

Customer Service



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