"Sheng

We appreciate your feedback. We are sorry that you have encountered some concerns about your computer fan.

The XPS 13 7390 BIOS update for fan performance was included in revision 1.3.1 – however, there is a more recent BIOS that contains critical security updates that should be used in place. You can find it here. https://dell.to/2yymQtX

For the touchpad, Some Notebooks and Tablets with Keyboards have added gesture features to the touchpad hardware and drivers. A few of these features are two or three-finger scrolling, pinch zoom, circle zoom, rotate, and swiping. These new features may be the reason for the erratic cursor movement since most are turned on by default. You can disable or modify the way the features work in the touchpad driver properties. Here are some tips to change these settings:

1. In the Search box, type main.cpl.
2. Touch or click main.cpl in the list of programs.
3. Touch or click the Dell Touchpad tab.
4. Touch or click on the picture of the touchpad.
5. Touch or click Gestures (depending on your computer, there may not be a Gestures option).
6. Change the options as preferred.
7. Touch or click Save.
8. Touch or click the X in the upper-right corner to close the Dell Touchpad Utility.
9. Touch or click OK on the Mouse Properties window.
10. If the touchpad still does not work after following the preceding steps, refer to Dell Knowledge Base article - http://dell.to/2iaiujA.
You can read the full article here - http://dell.to/2tqmS02.

Here is a link to the support page for your computer. https://dell.to/2xJX4T5 You can use this to check for any updates that may be available to you.

If the issue persists and you feel like you still need further assistance, you can reach Dell's support here. http://dell.to/2sH7Qlm or 1-800-624-9896. I hope this helps!

Best, Jon@Dell Chat or Call: http://dell.to/2sH7Qlm"

Sheng,

I am happy to hear that your computer is running well overall. However, I am sorry to hear of the issues you have expressed. Some Notebooks and Tablets with Keyboards have added gesture features to the touchpad hardware and drivers. A few of these features are two or three finger scrolling, pinch zoom, circle zoom, rotate and swiping.

These new features may be the reason for the erratic cursor movement since most are turned on by default. You can disable or modify the way the features work in the touchpad driver properties. Here are some tips to modify these settings:

1. In the Search box, type main.cpl.
2. Touch or click main.cpl in the list of programs.
3. Touch or click the Dell Touchpad tab.
4. Touch or click on the picture of the touchpad.
5. Touch or click Gestures (depending on your computer there may not be a Gestures option).
6. Change the options as preferred.
7. Touch or click Save.
8. Touch or click the X in the upper-right corner to close the Dell Touchpad Utility.
9. Touch or click OK on the Mouse Properties window.
10. If the touchpad still does not work after following the preceding steps, refer to Dell Knowledge Base article - http://dell.to/2iaiujA.

I hope this helps with the touchpad concern.

Also, here is a link for tips to assist you with the overheating concern,

http://dell.to/2uJ8AdG

Best,
Meridith @Dell Chat or Call: http://dell.to/2sH7Qlm