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


Spyware is software that is installed on your computer without your knowledge, and is used to steal your personal information. This information can include web browsing habits, e-mail addresses, credit card numbers, and more. It is installed on your computer automatically when you download seemingly innocent free software. Spyware then sends information about you to the software distributor. Usually the information sent is benign in nature, mostly concerning general marketing information.

Adware is advertising-supported software. It is software that can be downloaded free from the Web, but contains banner advertisements that create revenue for the company. Adware is software that is installed on your computer the same way spyware is, but it’s used for less harmful applications. Adware can change your home page, add extra bookmarks to your web browser, put advertisements on your desktop, and change your search results on Internet search engines like Yahoo and Google to advertisements.

Symptoms of Problems

Computers that have Spyware running may exhibit one or more of the following symptoms:

  • Internet browser crashes frequently
  • Computer runs slower
  • Computer takes longer to start up
  • “Illegal Operation” errors occur
  • Pop-up advertisements appear when you are offline
  • The default homepage of your browser changes without your knowledge
  • Toolbars you don't remember installing have shown up in your browser

Recommended Solutions

The best way to prevent Spyware/Adware from being installed is to be very careful about what you install. Most adware comes as a piggyback on other software you download. NEVER click though terms of use screens quickly. Look for checkboxes, pop up dialogs, etc. that might install an unwanted program.

Adware also can be installed by a website when you visit it. A pop-up may appear asking you to click "ok" to install a piece of software to "help" you. If you weren't expecting to install something do not click OK.

Install and use an anti-spyware program. Many of the larger anti-virus suites have a spyware scanner built in. Here are some suggestions for FREE spyware scanners:

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

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