Get the full details on this £5 stock now – while your report is free. Image source: Getty Images Tech shares have been the big growth story of recent years. But many tech stocks look expensive to me after the big gains we’ve seen over the last 12 months.Paying too much for a stock can limit long-term returns. To solve this problem, I’ve been hunting for good quality UK tech shares trading at attractive prices. I reckon I’ve found one company that I’d be happy to buy today.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Profits up 35%The business I’ve chosen is cyber security group Avast (LSE: AVST). The firm is well-known among home computer users for its free anti-virus software. But Avast does a lot more than that, offering a range of more sophisticated paid products for home and business users.Avast has been in business for 30 years and floated on the London market in 2018. I admit that I normally look for a slightly longer history, but that isn’t always possible in the tech sector.As it turned out, Avast’s performance has remained strong since its IPO. The group’s operating profit has risen by 35% since 2018 and has tripled since 2015.I reckon this tech share could keep growingAvast obviously faces tough competition from well-known rivals such as Norton and Kaspersky. I can’t be sure how it will perform against its competitors. But I think there should be plenty of growth to share around between them all.According to Avast, the wider market for its products is growing by around 10% each year. I think that should make it easier for it to keep growing than it would be in a more mature market.Another thing I like about Avast is that the founders Pavel Baudis and Eduard Kucera are both still involved in the business. The two men sit on the board as non-executive directors. Between them, they control around 35% of Avast stock, worth around £1.7bn.CEO Ondrej Vlcek is also a major shareholder. Mr Vlcek has a 2.3% shareholding which I estimate is worth around £110m. He’s been with Avast since 1995, when he joined as a software developer.With stable and invested directors, I feel confident that Avast will stay focused on delivering sustainable long-term growth. That’s just what I’m looking for in a tech share.What could go wrong?No company is perfect. Avast operates in a competitive market and it needs to continue attracting new users. It needs to continue investing in its technological capabilities while maintaining a strong public profile. I do wonder if Avast’s brand isn’t quite as strong as its better-known US rivals.Another concern is that it didn’t make big gains last year, despite the surge in home-working. The company’s adjusted revenue for 2020 only rose by 7.9%, excluding the impact of exchange rates.Avast has underperformed the FTSE 100 this year, but I think this tech share is starting to look quite reasonably valued. Broker consensus forecasts for 2021 price the stock on 17.5 times earnings, with a dividend yield of 2.6%. I’d be happy to buy the shares at this level, as I think they offer good long-term growth potential. Roland Head | Thursday, 6th May, 2021 | More on: AVST Are you on the lookout for UK growth stocks?If so, get this FREE no-strings report now.While it’s available: you’ll discover what we think is a top growth stock for the decade ahead.And the performance of this company really is stunning.In 2019, it returned £150million to shareholders through buybacks and dividends.We believe its financial position is about as solid as anything we’ve seen.Since 2016, annual revenues increased 31%In March 2020, one of its senior directors LOADED UP on 25,000 shares – a position worth £90,259Operating cash flow is up 47%. (Even its operating margins are rising every year!)Quite simply, we believe it’s a fantastic Foolish growth pick.What’s more, it deserves your attention today.So please don’t wait another moment. Simply click below to discover how you can take advantage of this. Enter Your Email Address Our 6 ‘Best Buys Now’ Shares I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. FREE REPORT: Why this £5 stock could be set to surge Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. See all posts by Roland Head If I could only buy one tech share, this would be it Roland Head has no position in any of the shares mentioned. The Motley Fool UK has recommended Avast Plc. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.