Cosmos Business System

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1249 S Diamond Bar Blvd
Diamond Bar, CA 91765
+1 (909) 468-2028
http://www.cosmoscomputer.com

Cosmos Business System, established in 1990, is known for providing honest and affordable computer repair and consultation services. With over 28 years of experience, technician Kevin leads the team in troubleshooting hardware and software issues, as well as managing local and wide area networks.

Due to the recent Safer at Home directive, Cosmos has transitioned to providing remote support services exclusively. The company continues to focus on customer satisfaction, ensuring that clients receive expert assistance from the comfort of their own homes.

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Reviews

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4.511 reviews
Sam G.
6/21/2025

WOW...Recently purchased a mini pc with 32g ram. Needed to replace the ram with 64g ram. I met up with Kevin on a Saturday morning around 9:30 - received a call around 11 stating the memory was...

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John X.
6/28/2025

My computer suddenly down this mornin, I searched computer repair in around area, I called and sent my computer to Kevin, by 3 hours I got it back, he fixed everything and installed free...

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Pyro T.
8/12/2024

Kevin was amazing and super communicative. I gave him a call to consult how to approach my issue with clearance with my PC and he even helped troubleshoot a faulty RAM stick that prevented the...

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Kelly L.
9/9/2024

Kevin was ABSOLUTELY FANTASTIC. I highly recommend bringing your computer to see him. I got my computer wet and he helped me bring it back to life. I highly recommend this business and he is very...

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Malinda H.
12/11/2017

It was a Saturday morning. All computer repair stores were closed. Of course my Surface Plus had all my assignments that were due by 10:30 AM stuck in it. It would not turn on no matter how long...

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"recently my computer completely shut off and there was a green blinking led light on the back next to where the power cord is plugged into the back of the CPU, i have a compaq presario sr1630nx, i..."
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