Microsoft says Fancy Bear hackers are targeting Windows users.
Lost files, emails no longer syncing and broken wifi have all been blamed on the upgrade.
Removing the ads costs $1.49 a month, or $9.99 a year.
There are a couple reasons why you may want to set the download for later, rather than sooner.
Instead of upgrading, the Navy pays millions to Microsoft to use the dead operating system.
Microsoft's new operating system name leaves some confused