Back in November I bought a Dell XPS 15, which came with Windows 8.1, so I never experienced 8. However, I'm having the same problems of the touch screen not working. After searching around on Google.. forever.. it seems that this is definitely a problem
with 8.1, and not a brand specific issue. Forums for Acer, Asus, Samsung and Dell (not to mention many others) were all complaining about this issue. Most of the fixes offered seemed to involve power management issues. I have tried the following:
-Went to Device Manager, and in the properties for all options under USB controllers I unselected "allow computer to turn off this device to save power". Also recommended was to uncheck this under Human Interface Device -> USB. I had to do a cold reboot to
even get that (and the touch screen drivers) to show up.
-Attempting to update every single driver in device manager. Only one of the many wanted an update.
-I also went to Power Option -> change plan settings -> advanced -> USB and disabled both options, as well as going to Power button and lids and changing all to "sleep".
-There were also links offered to download this or that to fix the problem, but they never came from a representative of any the companies, and I just plain don't trust anyone enough to randomly click a link to download something to my computer..
Everything I tried was recommended on one of the several forums that had this particular complaint. Apparently some or all combinations of these worked for a very few people on the forums. However, my touch screen still comes and goes, and will only reliably
come on if I do a cold reboot (and only for a unreliable amount of time). I'm hoping at some point Microsoft will offer a fix for this in a Windows Update, but it doesn't seem as if they are even acknowledging the problem exists at this point.