With Microsoft recently launching Windows 10, we decided to check TheStreet Quant Ratings for stocks in the systems software sub-sector that would be good investments. Windows 10 is one of Microsoft's biggest updates in years. The new upgrade focuses on attracting Windows 7 users who declined to update to Windows 8 and 8.1. The release of Windows 10 marks a change in strategy for the company from prior updates. The upgrade is free for individual consumers, but the company will charge corporate enterprise users a fee. Microsoft is gearing to attract more consumers to use its operating system, Windows 10, so that the company may be able to sell more of its products and services, much like Google does with its android operating system. Here are some of the best systems software stocks our algorithm says you should consider looking at. Number 3 is Symantec Corporation. With a 'B+' rating, the company's strengths can be seen in its expanding profit margins and notable return on equity. 2nd is, VASCO Data Security International. This rating is an 'A-.' VASCO thrives in its solid stock price performance and revenue growth. Number 1 is Check Point Software Technologies. This too has an 'A-' rating. The company flourishes in its revenue growth and notable return on equity. TheStreet Ratings are algorithmic stock picks based on 32 major data points. S&P 500 stocks rated 'buy' yielded a 16-and-a-half-percent return in 2014, beating the S&P 500 Total Return Index by more than 300 basis points. For the full reports on these stocks, you can check out TheStreet.com/QuantRatings.