I bought an Inspiron 15R SE in May and tried upgrading from Win 8 to Win 8.1 on 26 December. Problems became apparent when it finally booted to 8.1 and had to go through its configuration phase: it could not get a wi-fi connection, so I had to take the
laptop out to the hallway and wire it into the router.
I quickly learned that I had to reinstall the wi-fi and bluetooth drivers - initially I did this from the "Drivers and Utilities" DVD that came with the laptop. However, I experienced subsequent crashes and loss of wi-fi again, so I went to the Dell support
site and downloaded the latest drivers for wi-fi and bluetooth. But several times on starting the computer I saw the "thread_stuck_in_device_driver" error, and then I found this forum.
The Dell support site lists quite a few drivers besides the wi-fi and bluetooth ones, for which there are more recent versions than I have on my laptop. However, I gathered from this forum that the graphics card driver was a prime culprit and I downloaded
the update for that one. I can confirm that the laptop will now sleep and wake up without issue. I have not updated the other drivers yet - but I will bear it in mind if I come across other problems. I do not want to go through a lengthy procedure of updating
all drivers if there is no problem - "if it ain't broke, don't fix it".
Whilst I am unhappy about spending so many hours of my Christmas break recovering from the issues with the Win 8.1 upgrade, I am pleased to see that I can get a bluetooth connection to my phone much more easily now - one of the bugbears of Win 8.
In retrospect I would like the Dell support site to include pages entitled "Upgrading your Dell from Windows 8 to 8.1". This would cover going through the routine update from the Windows Store. It would recommend wiring the computer to the router, certainly
by the time that the computer was ready to first boot into 8.1. It would then direct users to the support pages for their model, advising reinstallation of wifi, bluetooth and anything else as appropriate (video drivers in our case). It would be ideal if Dell
could list the essential driver updates for Win 8.1 for each Dell model.