Consumer advice group Which? has called on Microsoft to "honour consumers' rights" and consider paying compensation to Windows 10 users over issues with the software.
Since being launched in 2015, Windows 10 has suffered several performance and reliability issues, including reports of it failing to recognise web cameras and some anti-virus software once installed.
Others have also accused Microsoft of "forcing" the update on them through the software's notification system. Since launch however, Microsoft says Windows 10 has been installed on more than 350 million devices, and as of August this year was running on 23% of PCs on the market globally.
But now consumer site Which? has released research which claims more than one in 10 (12%) of people surveyed who upgraded to Windows 10 in the UK have since chosen to roll back to their previous version, with more than half saying the software had "adversely affected their PC".
Alex Neil, Which? director of campaigns and policy said: "We rely heavily on our computers to carry out daily activities so, when they stop working, it is frustrating and stressful. Many people are having issues with Windows 10 and we believe Microsoft should be doing more to fix the problem."
The group suggested that Microsoft consider paying compensation to customers "where appropriate", explaining that consumer rights dictate that digital content, like other goods, must be of satisfactory quality and if faulty should be repaired or replaced.
"You can also ask for your money back, up to 100% of the cost of the product", Which? added.
Windows 10 was made available as a free update to users running Windows 7 and 8 until the end of July this year, but now costs £99.99 to install.
In response to the research, a Microsoft spokesperson said: "The Windows 10 upgrade is a choice designed to help people take advantage of the most secure, and most productive Windows.
"Customers have distinct options. Should a customer need help with the upgrade experience, we have numerous options including free customer support."