I also had the same problem. i called acer and they said it would take 2 to 3 weeks for them to repair my laptop and i didn't want to wait. so i decided to fix it myself besides i know a lot about computers (also in electrical engineering major). i did research and found out that this problem wasn't even acer r7 problem, it was actually Windows 8.1 problem with touch screen laptops. SO YES THIS SOLUTION WILL ALSO WORK FOR OTHER LAPTOPS HAVING THE SAME ISSUES ON WINDOWS 8.1. Let's get started.
STEP 1: Go to acer's driver download @ http://us.acer.com/ac/en/US/content/drivers
Download the latest BIOS update for your laptop model type. Install it and wait for it to finish and restart.
STEP 2: Go to task manager. Click on "services" tab and then click on "open services". Find the following services, right click on properties and change their start up to AUTOMATIC (if it isn't already)
>> APPLICATION EXPERIENCE
>> HUMAN INTERFACE DEVICE SERVICE
>> EZel SENSOR SERVICE
>> DIAGNOSTIC POLICY SERVICE
>> PROGRAM COMPATIBILITY ASSISTANT SERVICE
>> TOUCH KEYBOARD AND HANDWRITING PANEL SERVICE
RESTART YOUR COMPUTER
STEP 3: Go to Device Manager >Expand "Human Interface Devices"
Right Click on ALL the USB Input Device > Properties > Power Management tab
UNCHECK the "Allow windows to turn off this device to save power."
Click Apply and OK.
RESTART YOUR COMPUTER
STEP 4: On the START SCREEN search for "touch" and click on the "Calibrate the screen for pen and touch inputs." On the Display tab, click on "Setup" > select "touch", and then touch on your laptop touchscreen. Hit "Enter" key if screen doesn't automatically close. Click Apply and then OK.
You can also use this ^^ step to calibrate your touch screen after RESTART.
STEP 5: Go to Power Options > Change plan settings > Change advanced power settings. Make the following changes.
USB settings > USB selective suspend settings > Disable of On battery and plugged in.
RESTART YOUR COMPUTER
>>>>>>>>>>>>>>>>>Reply and let me know if this worked for you.<<<<<<<<<<<<<<<<<<<<<<<<<<
ALSO WHILE AT IT, YOU CAN BOOST UP YOUR ACER R7 INTERNET
STEP 1: Go to Device Manager > Network Adapters > Broadcom .... network adapter > Properties.
Click on Advanced tab and change the following settings.
IBSS MODE > 802.11a/b/g Performance
XPress (TM) Technology > Enabled
STEP 2: your wifi should restart and reconnect to your network. HAPPY FAST SURFING.
**PLEASE LET ME KNOW IF THIS HELPS ANY ONE ELSE BECAUSE I'VE ONLY TRIED IT ON MY LAPTOP AND IT'S BEEN WORKING FINE SINCE.**
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