Onsite computer help · since 1999
We come to you and make your technology work.
Computers, networks, security and anything else that connects to the internet. Serving Marin, southern Sonoma and San Francisco, by referral.
If it connects to the internet, we can help.
Installation, troubleshooting and upkeep for homes and small offices.
Computers and phones
Windows, Mac, iPhone, iPad and Android: setup, troubleshooting, upgrades and syncing across devices.
Networks and Wi-Fi
Wi-Fi optimization and whole-home coverage, including Ubiquiti systems, plus wiring and troubleshooting.
Security and passwords
Security software like Malwarebytes, password managers, malware cleanup, and email that works everywhere.
AI, training and documentation
Getting started with AI assistants, one-on-one tutorials, and written notes on how your setup works.
Home audio and streaming TV
Whole-home audio like Sonos, streaming TV services, and getting it all working together.
Backup and buying advice
Backups, data recovery, and help choosing what to buy.
How we work
Onsite at your home or office
Remote help by phone and screen sharing when a visit isn’t needed.
Where
Marin · Southern Sonoma · San Francisco
Long-time clients elsewhere in the Bay Area are still welcome.
No surprises
No contracts
Regular visits or as needed. No paying to wait; we come back if a return visit is needed.
Rates
One simple hourly rate for onsite and remote work.
$210per hour
- 1-hour minimum, then 30-minute increments
- Payment at time of service: cash, card or check
- Travel time may apply
About
Castro Computer Services has looked after homes and small businesses since 1999. Most of our clients have been with us for years, and most new ones come through their recommendation.
Certifications
Contact
We work by referral. Let us know who sent you and what you need, and we’ll get back to you.
(415) 826-6678