Great service and timely delivery. Will use this business again. I recommend Oleg highlyread more

We have worked with Oleg of The Valueline Computer Services since 2015. He is very knowledgeable…read moreand a fantastic problem solver. The technical skill and intuition are second to none, Highly recommend. Wouldn't trust my business hardware and software to anybody else.

It had a cracked screen on my iPhone I called and talked to Adam and told him I was in need of…read moreiPhone repair, he said to bring it in and he will get it fixed. I dropped my phone off and within an hour they called me to tell me my phone was ready for pickup. Very professional and honest. The price will beat any other company around. Thanks again for great service and experience

Try to avoid this place by any means!! ..Unprofessional , dishonest, rude people !!!…read moreHe promised to fix my computer for 4-5 days. After one week I start calling , nobody answering , went to his office , .. no response for 3 weeks. After taking computer home I experienced a serious problem with my PC. I had been calling again for 2-3 months - no response. Later He told me that he was not responsible for this problem. Igor Panasyuk , Round Lake

I had a horrible experience with this place. I went here because of a referral from a family…read moremember, and it did not turn out well. I purchased a computer the first week of September 2025, and from the time I bought it until I finally called the store to report the issues the computer was having was approximately 9 weeks. I had been having all sorts of problems with this computer (I have a list of 8 different problems which I explained), and the individual I spoke to blamed me for all of them. Then, in addition to that, he accused me of not paying for their subscription service even though I had already paid when I purchased the computer and had an active credit card on file for the following monthly subscription fees. Then he accused me of yelling at him which I was not (my sister heard the whole conversation) and in the end just hung up on me. So now I am stuck with this piece of junk computer. DO NOT BUY ANYTHING FROM THIS PLACE - if there is a problem it will be your fault and you will not get any real help.

This guy does not stand behind any of his work and has messed up many family laptops. I would not…read morerecommend his work ever. If I could give less than one star I would.

I very highly recommend Zytek Services! Paul is so friendly…read moreand knowlegable. SO very glad I chose to have him fix my computer. GREAT SERVICE!!!!!

Zytek is my go-to for any computer issues. They've recovered really important items when my…read morecomputer crashed, transferred everything to a new computer for me, and resuscitated my old laptop with a new battery. And the prices are very reasonable! Highly recommend.

SCAMMERS! BEWARE! i paid $140 for a "better quality" iphone…read morescreen replacement with 60 day warranty. the screen did not work correctly since day one. refuses to replace screen or give my money back

I have been there twice in the last couple weeks because my daughter keeps dropping her phone…read more Both times the nice people there fixed her phone quickly as a walk-in. I'm happy we found a local, reliable, and honest computer repair shop with reasonable pricing so close to my home.

Let me paint a picture for you all:…read more Friday morning, I sat down in my hotel room in Champaign with a bit of breakfast and my laptop balanced on the arm of the couch. The computer fell back, hitting the floor and popping the glass screen out of the shell (rendering the computer completely unusable). Four hours later, I made it back to Mundelein and brought my computer to the Computer Guys. Three hours after that, the Computer Guys called me to tell me my problem was fixable, how long it would take, and how much it would cost. The next morning, I received another call to tell me it was ready for pickup. I got to the shop, verified that my laptop was up and running, and I went on my merry way, fully-functioning computer in hand. In less than 24 hours, my computer went from functional to broken to functional again, and I couldn't have done it (and done it affordably) without the Mundelein Computer Guys. As long as I live in the area, I won't go anywhere else for my computer-related needs.

Worst experience ever. I took my PC in for them to troubleshoot. After waiting 3 days, I called…read morethem to get an update and the guy on the phone didn't know but said he'll text me back. I didn't hear anything for next 2 days. I finally tried calling back and couldn't get through with anyone but texted them asking for an update. There was no response. I then go in and the guy was extremely rude and pointed at my computer which was on display at the front. It looked like it wasn't even looked at. I took it back and the guy was just very rude and awful. Very unprofessional people who don't seem to know anything about computers.

We had to stop by and get a phone repair done. In the process of doing so the person who helped us…read morewas great and I would highly recommend coming here again!!!

Stopped in to have an office laptop password removed. Work was completed same day. Great…read moreexperience from greeting me at the door to completing the task requested. I highly recommend.

Purchased some expensive replacement toner for our Cannon copier in November. Ending up ruining our…read moreCopier. They claim they received a "bad" batch! Been waiting for a replacement for 4 MONTHS! I have to keep calling them week after week...Customer Service is TERRIBLE! Thank goodness Cannon replaced their product for free. This should have been replaced by now...what a scam! Will not be purchasing in the future! Napleton Mazda Dealership

Mcdermott PC is truly better than any tech place in town, the prices are fair, the service is…read moreundeniably great, and the friendly owner Peter knows more about technology than I may ever know in my lifetime. I would highly recommend people to this establishment for almost anything. Mcdermott PC covers such a wide variety of parts and services, he's bound to have what you need. Plus, he offers a free basic computer diagnostic if you're having computer troubles.