Microsoft has been criticised over its Windows 10 software by consumer rights group Which?.
The body said it had received hundreds of complaints about the upgrade, including lost files, emails no longer syncing and broken wi-fi and printing.
In some cases, it said, users had had to pay for their computer to be repaired.
Microsoft defended its software and highlighted that it provided help online and by phone.
"The Windows 10 upgrade is a choice designed to help people take advantage of the most secure and most productive Windows," said a spokesman.
"Customers have distinct options. Should a customer need help with the upgrade experience, we have numerous options including free customer support."
Which? surveyed more than 5,500 of its members in June, and said that 12% of the 2,500 who had upgraded to Windows 10 had later reverted to an earlier version.
It's not a surprise to anyone on Soylent, but this is the sort of thing that causes conventional wisdom to shift.
(Score: 3, Insightful) by tangomargarine on Friday September 23 2016, @02:04PM
As of Windows 8.1 at least, they're still defaulting to hiding all file extensions by default, which is moronic and somewhat dangerous, too.
"Is that really true?" "I just spent the last hour telling you to think for yourself! Didn't you hear anything I said?"