Dell XPS 15 7590 with Wi-Fi 6 AX1650 looses connection or cannot connect and disturbes surrounding WiFi / WLAN

I am facing WiFi issues with my Dell XPS 15 7590 and the Killer Wireless 1650 WiFi card. Installing latest Windows 10 and Dell Updates, replacing Dell WiFi Drivers by Killer Drivers (Aug 2nd) did not fix the problems.

On some WiFi I only can connect, if I disable ac/ax in the card driver properties or set the 2.4 GHz to 802.11b or  802.11g (Otherwise Windows keeps prompting for WPA key, even if it is correct).  On others the connection frequently drops for 1-2 seconds and then reconnects, even if I am just browsing (no heavy load on the card).

How-I-fixed-it:
Found the solution in the Dell community forum:
https://www.dell.com/community/XPS/XPS-15-7590-disconnecting-Wifi/td-p/7365191 

Found out that Killer AX1650 is based on the Intel AX200NGW:

http://forum.notebookreview.com/threads/killer-ax1650-vs-intel-ax200ngw-which-wifi-card.830169/

I downloaded the Intel drivers for the AX200:
https://downloadcenter.intel.com/download/29003/Windows-10-Wi-Fi-Drivers-for-Intel-Wireless-Adapters?product=189347

I downloaded the driver removal software from Killer:
http://support.killernetworking.com/software/

I uninstalled the Killer drivers and rebooted my computer.
Then I installed the Intel drivers.

In the Device Manager it then looks like this:

Dell XPS 12 screen auto-orientation / orientation randomly stops when in tablet mode under Windows 8.1

A few days ago i received my new Dell XPS 12 convertible ultrabook / tablet. I noticed, in tablet mode sometimes the screen quits auto-rotate and the auto-rotate on/off-button becomes inresponsive. I have to go to display settings manually and Switch back to 0 degress or do a reboot.

How-I-fixed-it:
Following the hints by guy_mx99 in this thread, i let Windows Update do a manual search on available updates. Under optional updates there were also listed 3 Windows 8.1 Drivers. After installing all optional updates Auto-Rotation now seems to work OK.

I noticed, the issue is discussed in some Forums already, so here are the links i found so far on this issue.

http://en.community.dell.com/support-forums/laptop/f/3518/p/19493100/20512873.aspx#20512873

http://en.community.dell.com/support-forums/laptop/f/3518/p/19528623/20500967.aspx

http://commweb-ps3.us.dell.com/support-forums/laptop/f/3518/p/19537377/20497975.aspx

http://answers.microsoft.com/en-us/windows/forum/windows8_1-hardware/switching-between-tablet-and-laptop-mode-on-dell/6908176b-1a4b-4399-a6d8-766e3331ce4a

http://answers.microsoft.com/en-us/windows/forum/windows8_1-hardware/screen-rotation-dont-work-propertly-on-xps-12-9q33/eff977a1-e1f4-4c91-ae4d-e6ca3e78d858

http://en.community.dell.com/support-forums/laptop/f/3518/p/20497926/reply.aspx

My Dell PC/Computer/Laptop/Tablet is marked as shipped, but UPS tracking link does not find the shipment/parcel

I ordered a new tablet computer from Dell two weeks ago. The estimated date of delivery is in a few days.
I was surprised that the device was marked as shipped in the order status hompage after one week (by that time, the estimated delivery date was two weeks away). The order Status page showed a UPS tracking link, but UPS Homepage returned, they cannot find the shipment with this tracking number.
I testing the tracking link every day and after 5 days I sent an EMail to Dell asking them, why it does not work.

How-I-fixed-it:
Well, i did not really fix it, but I now know, what makes the order status page so confusing. After the device is ready for UPS to be picked up at the Dell site, it's marked as shipped and the tracking link is created. While the device is on the way to Europe, UPS tracking link does not find the parcel number. In case it's on a ship, this can last for a week or even longer.
UPS tracking starts to work when the shipment is scanned in Europe for the first time, which, in my case, was 3 days before the formerly estimated date of delivery. So the shipment is on time and the estimated date of delivery at the time of order was fine.

Laptop Dell Vostro 3500 turns itself off without prior notification because of system becoming too warm

One day my wife's Dell Vostro 3500 Laptops started to turn itself off when in use without any warning message or notification. Turning it on again it worked for a while an then powered off again without any hint where the problem may be caused by.

How-i-fixed-it:
I turned out to be caused by the fan assembly air outlet being full of dust so that no air was going through it any more to cool down the system. To get to it to clean it means disassembling the whole system but following the procedure well described in the service Manual under "
Removing the Heat Sink and Fan Assembly",
it took me about an hour to get the job done and since that, the system is running fine again.

Here's the link to the Dell Vostro 3500 Service Manual:
ftp://ftp.dell.com/Manuals/all-products/esuprt_laptop/esuprt_vostro_notebook/vostro-3500_service%20manual_en-us.pdf

Update: Had to clean it again Apr. 2014, Mai 2015.
Seems like it need yearly maintenance :-)
 Here are some images how the fan assembly looked like: