If you live outside the US and installed Windows 10 Technical Preview, you may be disappointed when Microsoft's new virtual assistant Cortana greets you with following message:

I'm afraid I'm not available to help in your region.

Hopefully Cortana will be supported in a variety of regions and languages on release, but as of now it only works in the US. Since it's pre-release version of Windows we can't really complain about this too much... Still, if you want to try Cortana outside of the US, you can do this by changing your region and language settings.

Read more: Windows 10 Preview Cortana - I'm afraid I'm not available to help in your region

When you download any file with Google Chrome and click on a little arrow down, one of the options is "Always open files of this type". If you select this option, all files of that type will be automatically opened immediately after downloading.

It may not be immediately obvious how to reverse this option and stop files opening automatically after downloading.

Read more: Stop Google Chrome from opening files after download

Even if you select CD/DVD drive as your first boot device, Acer XC600 will simply ignore this and boot from the internal hard drive. To boot from CD or USB drive on Acer XC600 and similar Windows 8 machines you need to make 2 additional changes in BIOS.

Read more: Acer XC600 - how to boot from CD

In Windows 7, if you are in a folder that was made available offline, you can always see Work offline button on the top toolbar. This allows to force working offline even when you are connected to the server. Very useful if connection is slow or unstable.

Similarly, if you are working offline, the above button changes to Work online and allows you to go back to an online mode.

Read more: Where is Work Offline button in Windows 8